13 Yellow Birds in Wisconsin (with Pictures for Easy ID)

Wisconsin supports a varied selection of yellow birds across its forests, wetlands, grasslands, river floodplains, shrublands, and agricultural landscapes. Familiar species such as the American Goldfinch and Common Yellowthroat occur widely, while meadowlarks, vireos, and several warblers bring different shades and patterns of yellow to the state during the breeding season and migration. Some species show brilliant yellow across much of the body, while others display yellow mainly on the face, throat, breast, or underparts, often combined with distinctive black, olive, gray, or white markings. This visual ID guide covers the yellow birds most likely to attract attention in Wisconsin and provides practical clues for recognizing them in the field.

American Goldfinch

Spinus tristis

• Identification: Small songbird with a short conical bill and notched tail; breeding males are bright lemon yellow with a black cap and black wings marked with white; females and winter birds are duller yellow to brownish with wingbars.
• Field recognition: Often noticed by flashing yellow in bounding, undulating flight with a distinctive “po-ta-to-chip” call, and by acrobatic feeding on seed heads or at thistle feeders.
• Where found: Widespread across Wisconsin, breeding throughout the state and occurring year-round in the southern two-thirds, especially in open rural areas and around feeders.
• Conservation status: Least Concern (IUCN); common in Wisconsin, though winter numbers can vary from year to year.

The American Goldfinch is the most familiar yellow bird in Wisconsin and is often the species people mean when they notice a small, bright yellow finch at a feeder or in open country. This species measures 11 to 13 centimeters (4.3 to 5.1 inches) in length and has a compact body, small head, long pointed wings, and a short, notched tail. In breeding plumage, adult males are vivid lemon yellow across the body, with a jet-black cap on the forehead and crown and black wings marked with white. Females are less saturated, with olive to brownish upperparts and yellowish underparts, while winter birds of both sexes appear drab brown overall with blackish wings and two pale wingbars, lacking streaking.

American Goldfinches are most often noticed by their bright yellow color in spring and summer as they fly between perches in open country or visit feeders. Their flight is buoyant and undulating, with quick wingbeats followed by brief glides, and the distinctive “po-ta-to-chip” flight call often reveals their presence before they are seen. Goldfinches feed actively and acrobatically, clinging to thistle heads, seed stalks, or hanging feeders and sometimes hanging upside down to reach seeds. They feed almost entirely on seeds, especially those of thistles and asters, and in Wisconsin thistle feeders and rural areas provide particularly good opportunities to see them.

The American Goldfinch breeds throughout Wisconsin and is a widespread, common year-round resident across the southern two-thirds of the state. It is a common migrant and breeder from late April to mid-November and also remains a common winter species, although numbers can vary considerably from year to year. The species favors open habitats with abundant seed-producing plants, including weedy fields, roadsides, agricultural areas, and other open rural settings, and it regularly occurs around feeders.

Northern Yellow Warbler

Setophaga aestiva

• Identification: Small, evenly proportioned songbird with a thin bill; adult males are bright yellow overall with chestnut streaks on the breast; females are duller and lack bold streaking.
• Field recognition: Most often noticed by its saturated yellow color in shrubs and trees near water, active foliage-gleaning, and the sweet, whistled song of breeding males.
• Where found: Widespread across Wisconsin during summer in moist open woodlands, shrubby meadows, willow tangles, riparian woods, and other brushy habitats near water.
• Conservation status: Least Concern (IUCN); a common migrant and breeder throughout Wisconsin.

The Northern Yellow Warbler is the most uniformly yellow bird seen in Wisconsin during spring and summer, especially in shrubby habitats near water. This small warbler measures 12 to 13 centimeters (4.7 to 5.1 inches) in length and has a rounded head, medium-length tail, and a relatively straight, thin bill. Adult males are vivid yellow across the face, throat, and underparts, with distinctive chestnut streaks on the breast, while the upperparts are yellow-green to olive. The tail shows yellow on the inner webs, which can produce noticeable yellow flashes in flight. Females are less conspicuous, with greener upperparts, duller yellow underparts, and little or no chestnut streaking.

Northern Yellow Warblers are most often detected as bright yellow birds that move actively through shrubs and trees, where they glean small insects from leaves and other vegetation. Caterpillars form an important part of the diet, along with inchworms, beetles, aphids, cankerworms, and other invertebrates, and the birds occasionally hover-glean to reach prey. Males often forage and perch higher in trees than females and frequently sing from exposed perches during the breeding season. Their sweet, whistled song, often rendered as “sweet sweet sweet, I’m so sweet,” can reveal their presence before the bright yellow bird comes into view.

The Northern Yellow Warbler is a common migrant and breeder across Wisconsin from late April through summer. It favors moist, open woodlands with dense low scrub as well as shrubby meadows, willow tangles, riparian woodlands, gardens, and swampy areas. Southward movement begins in July, and the species is generally gone from Wisconsin by the end of August.

Common Yellowthroat

Geothlypis trichas

• Identification: Small songbird with olive upperparts and bright yellow throat and upper breast; adult males show a bold black facial mask bordered above by a pale band; females are duller and lack the mask.
• Field recognition: Most often detected by flashes of yellow moving low through dense vegetation, frequent skulking behavior, and the familiar rolling “wich-i-ty” song.
• Where found: Widespread throughout Wisconsin during summer in cattail marshes, sedge wetlands, open bogs, wet meadows, riparian willow and alder thickets, and other habitats with dense low vegetation.
• Conservation status: Least Concern (IUCN); a common Wisconsin breeder with a slight increasing trend, although local wetland loss may affect populations.

The Common Yellowthroat is a widespread and common yellowish warbler in Wisconsin and is especially characteristic of marshes, wetlands, and overgrown fields. It measures 11 to 13 centimeters (4.3 to 5.1 inches) in length and has a compact body, rounded head, and a medium-length, slightly rounded tail. Adult males have plain olive upperparts and bright yellow on the chin, throat, and upper breast, set off by a broad black mask across the face and a narrow whitish to grayish band above it. The belly is paler, the flanks are dusky, and the undertail coverts are yellow. Females lack the black mask and appear duller overall, with olive-brown upperparts and paler yellow underparts.

Common Yellowthroats are usually noticed as quick flashes of yellow close to the ground as they move through tall grasses, cattails, reeds, shrubs, and other dense vegetation. They hop among stems and branches, make short flights between patches of cover, and often remain partly concealed, so the male’s familiar rolling “wich-i-ty-wich-i-ty” song frequently reveals the bird before it comes into view. They glean adult and larval insects and spiders from vegetation and also hover to take prey, which includes beetles and dragonflies; seeds are eaten occasionally. Males may become more conspicuous during courtship, when they bounce in and out of tall grass while vocalizing.

The Common Yellowthroat is widespread throughout Wisconsin and is the most evenly distributed of the state’s breeding warblers. It occupies cattail marshes, sedge wetlands, low meadows, open bogs, beaver ponds, wet grassy fields and pastures, and riparian willow and alder thickets, with occasional use of dry abandoned fields; in northern Wisconsin it favors open bogs over conifer-dominated swamps. Spring migrants arrive mainly from early to late May, while fall movement begins in mid-August and continues through late September in northern Wisconsin and into October farther south. The species remains a common breeder with a slight increasing trend in Wisconsin, although loss of wetlands and other preferred habitats may affect populations locally.

Eastern Meadowlark

Sturnella magna

• Identification: Medium-sized, stocky songbird with bright yellow underparts marked by a bold black crescent on the chest, patterned brown-and-black upperparts, and conspicuous white outer tail feathers visible in flight.
• Field recognition: Often noticed by its intense yellow breast on fenceposts or other exposed perches, low quail-like flight with flashes of white in the tail, and clear, flute-like whistles across open grasslands.
• Where found: Widespread across Wisconsin during summer where suitable open habitat remains, especially in pastures, grasslands, hayfields, old fields, prairies, and other agricultural landscapes.
• Conservation status: Near Threatened (IUCN); Wisconsin populations have declined significantly since the 1960s as agricultural intensification and grassland habitat loss have reduced suitable habitat.

The Eastern Meadowlark is a distinctive yellow bird of Wisconsin’s open grasslands and agricultural landscapes, where its bright breast makes it conspicuous against otherwise cryptic plumage. This species measures 19 to 26 centimeters (7.5 to 10.2 inches) in length and has a chunky body, long legs, a long, slender bill, and a short, stiff tail. The upperparts are intricately patterned with browns, buffs, and black streaks, while the throat and underparts are vivid yellow. Adults show a bold black crescent across the chest, and the largely white outer tail feathers produce bright flashes in flight. Females resemble males but are slightly smaller and less strongly marked.

Eastern Meadowlarks are often detected when their bright yellow breasts become visible on fenceposts, wires, or other exposed perches above fields and pastures. Their low, quail-like flight combines rapid, shallow wingbeats with short glides, and the white outer tail feathers provide a useful identification clue when birds flush from the grass. On the ground, they walk or run through vegetation and probe the soil and litter with their long bills for insects. Males also reveal their presence with clear, flute-like whistles that carry across open country.

The Eastern Meadowlark occurs statewide in Wisconsin wherever suitable open habitat remains and is a common migrant and breeder from early March to early November. It favors pastures, hayfields, idle short- to medium-height grasslands, old fields, dry-mesic prairie, oak savanna, weedy fields, grassy roadsides, and some croplands, with more moist grasslands generally preferred than those used by Western Meadowlarks. A few birds remain into winter, when the species is uncommon in southern and central Wisconsin and may stay farther north during warmer winters. Wisconsin populations have declined significantly since the 1960s as intensive agriculture, conversion of grasslands, frequent hay cutting, and the scarcity and fragmentation of native prairie have reduced suitable habitat.

Western Meadowlark

Sturnella neglecta

• Identification: Medium-sized, stocky songbird with bright yellow underparts marked by a bold black V-shaped breast patch, patterned brown upperparts, and white outer tail feathers.
• Field recognition: Often noticed by its yellow breast in open grasslands and by its rich, elaborate flute-like song, the most useful field cue for separating it from the similar Eastern Meadowlark.
• Where found: Widespread in southwestern and western Wisconsin during summer, especially in dry, open pastures, grasslands, small-grain fields, hayfields, and other agricultural country.
• Conservation status: Least Concern (IUCN); populations have declined significantly in Wisconsin since 1980, with decreases especially apparent in the eastern half of the state.

The Western Meadowlark is the less widespread of the state’s two meadowlarks and is most likely to attract attention in the open country of western and southwestern Wisconsin. It measures 19 to 21 centimeters (7.5 to 8.3 inches) in length and has a chunky body, flat head, long, slender bill, long legs, and a short, stiff tail. The upperparts are intricately patterned with buffs, browns, and black, while the underparts are bright yellow with a bold black V-shaped patch across the chest. White in the outer tail feathers becomes conspicuous in flight. Compared with the Eastern Meadowlark, the yellow throat extends farther onto the face, the upperparts are generally paler and grayer, and the tail shows less white.

Western Meadowlarks are often detected by their bright yellow breasts as they forage on the ground or perch conspicuously above open grasslands and agricultural fields. They walk or run while feeding and use their long bills to probe the ground for insects, seeds, and other foods; Wisconsin birds examined in December had fed mainly on corn and oats, with some insects also present. When flushed, they fly low with rapid, stiff wingbeats alternating with short glides. Their rich, elaborate song provides the most reliable field cue for distinguishing them from Eastern Meadowlarks, whose whistles are clearer and simpler.

The Western Meadowlark occurs in Wisconsin mainly as a migrant and breeder, with birds arriving in spring and departing from mid-September into early November; some also occur in southern Wisconsin in winter. It favors pastures, small-grain fields, hayfields, dry old fields, dry-mesic prairie, open barrens, and other short, open grasslands, generally selecting drier sites with shorter vegetation and less woody cover than the Eastern Meadowlark. The species remains most widespread in southwestern Wisconsin, where prairie remnants, pastures, and other suitable grasslands are most extensive, but numbers have declined significantly since 1980 and have decreased especially in the eastern half of the state. Conversion of pastures and small-grain fields to row crops, grassland fragmentation, early hay harvest, and other agricultural changes have reduced suitable habitat.

Orchard Oriole (Female)

Icterus spurius

• Identification: Medium-small songbird with a relatively short tail; females and immatures are greenish yellow below and olive-green above, with brownish wings marked by two narrow white wingbars.
• Field recognition: Usually noticed as a yellow-green oriole moving actively through trees and shrubs, where it searches foliage for insects and berries or probes flowers for nectar.
• Where found: Occurs in Wisconsin during summer, mainly in the southern part of the state, in open woodlands, suburban parklands, forest edges, farmsteads, savannas, and groves of shade trees.
• Conservation status: Least Concern (IUCN); uncommon in Wisconsin, with wooded urban environments providing suitable habitat for the species.

The female Orchard Oriole is a distinctive yellow-green bird seen in Wisconsin during the warmer months, although the species is an uncommon migrant and breeder in the state. It measures 15 to 18 centimeters (5.9 to 7.1 inches) in length and has a slim body, rounded head, straight pointed bill, and relatively short tail. Females and immature males show greenish-yellow underparts and olive-green upperparts, which create a subdued yellow-green appearance unlike the chestnut-and-black plumage of adult males. Many immature males show a small black throat patch or dark markings around the bill, while the brownish wings have two narrow white wingbars.

Female and immature Orchard Orioles are usually detected by their active movements through the foliage of trees and shrubs rather than by strongly contrasting plumage. They hop along branches and inspect leaves and vegetation for insects and berries, and they also probe flowers for nectar. Their light, buoyant flight and soft “jeet” or “chuk” calls can provide additional clues when the birds move between trees. In Wisconsin, open deciduous woods, farmsteads, park-like areas, and groves of shade trees provide useful places to watch for their yellow-green plumage.

The Orchard Oriole breeds mainly in southern Wisconsin and occurs as an uncommon spring migrant and uncommon breeder in the state. Birds generally arrive from May 10 to 15 and are rarely observed after August 15, which gives the species a relatively short period of occurrence. Wisconsin habitats include open woodlands, suburban parklands, forest edges, hedgerows, farmsteads with tall shade trees, savannas, and silver maple-elm forests, with records also concentrated in wooded urban environments. Suitable habitat extends along the western, eastern, and southern parts of the state, while the breeding distribution is centered mainly in southern Wisconsin.

Nashville Warbler

Leiothlypis ruficapilla

• Identification: Small songbird with a thin pointed bill, gray head, bold white eye-ring, olive-green upperparts, and bright yellow underparts with a contrasting whitish lower belly.
• Field recognition: Often noticed as a yellow-and-olive warbler with a striking white eye-ring moving actively through foliage, where it gleans insects from leaves and gives sharp “chip” notes or a two-part song.
• Where found: Widespread across Wisconsin during migration and breeding mainly in northern and central regions, where it uses second-growth mixed woods, jack pine forests, conifer wetlands, bogs, and other shrubby or open forest habitats.
• Conservation status: Least Concern (IUCN); a common northern Wisconsin breeder with no significant long-term decline reported in the state.

The Nashville Warbler is a very common migrant across much of the state and a characteristic yellow warbler of northern Wisconsin during the breeding season. This species measures 11 to 13 centimeters (4.3 to 5.1 inches) in length and has a compact, round-headed body and relatively short tail. The head is gray with a bold, complete white eye-ring, while the upperparts are olive green. The throat, breast, and undertail coverts are bright yellow, but the lower belly is distinctly whitish, which creates a useful yellow-white-yellow pattern when viewed from below. Adults have a small rufous crown patch that is usually concealed, while females and young birds are similar but generally duller.

Nashville Warblers are typically identified by the combination of bright yellow underparts, gray head, prominent white eye-ring, and active movements through trees and shrubs. They forage mainly among foliage, where they glean insects such as caterpillars, flies, and aphids from leaves, and during migration they often use the mid-canopy and woodland edges. Males give a distinctive two-part song during the breeding season, with evenly spaced notes followed by a faster trill, while sharp “chip” calls can also reveal birds hidden among foliage. During migration, these behaviors make the species easier to detect as it passes through woodlands across Wisconsin.

The Nashville Warbler is a very common spring and fall migrant throughout Wisconsin, with spring passage from late April through May and fall movement mainly from mid-August to mid-October. Breeding is concentrated in northern and central Wisconsin, where the species is common in the north but uncommon farther south in the central region. It uses second-growth mixed woods, jack pine forests, black spruce and tamarack bogs, wet conifer forests, pine barrens, alder, cedar-spruce swamps, and moist shrubby areas, with particularly suitable habitat across the forested north, including the Chequamegon-Nicolet National Forest. Wisconsin populations show no significant long-term decline, and the species’ use of second-growth and other disturbed forest habitats helps maintain extensive breeding habitat in the state.

Pine Warbler

Setophaga pinus

• Identification: Small songbird with olive upperparts, yellow underparts paling to white on the belly, two pale wingbars, and a stout bill; males are brighter yellow than females and immatures.
• Field recognition: Most often detected high in pine canopies by its steady musical trill and subdued yellow-and-olive plumage as it moves deliberately among needles and branches.
• Where found: Occurs in northern and central Wisconsin during summer in open mature pine woods and pine plantations; migrants also occur in mixed and deciduous woods farther south.
• Conservation status: Least Concern (IUCN); a fairly common breeder in northern Wisconsin but more local farther south, with strong dependence on suitable pine habitat.

The Pine Warbler is a characteristic yellow bird of Wisconsin’s pine forests and is most regularly encountered during the breeding season in northern and central parts of the state. It measures 13 to 14 centimeters (5.1 to 5.5 inches) in length and has a sturdy build, long tail, and a thicker bill than most warblers. Adult males show olive-green upperparts and clear yellow underparts, sometimes with faint darker streaking on the breast and flanks, while the lower belly and undertail coverts are whitish. The face has a weak yellow eye-ring and subtle supercilium, and the dark wings show two pale wingbars. Females and immatures are duller, with paler yellow or buffy underparts and more brownish or grayish tones above.

Pine Warblers are often detected by sound because they spend much of their time high in pine crowns, where they move deliberately along branches and needles. Males give a clear, even, musical trill that carries through pine woods and often reveals the bird before its subdued yellow-and-olive plumage becomes visible. They glean insects from foliage and also forage on the ground, and they may hang upside down from branch tips while searching for food. Berries and seeds supplement their largely insect-based diet.

The Pine Warbler breeds mainly in northern and central Wisconsin, where it favors open, mature pine woodlands and mature pine plantations, and it is only a rare and local breeder in southern Wisconsin. It is fairly common as a breeder in the north and uncommon in central regions, while migrants may appear in mixed and deciduous woods outside their typical breeding habitat. In central and southern Wisconsin, spring migration occurs mainly from late April to mid-May, and fall migrants pass through from September into early October. The species is closely associated with upland coniferous habitats, particularly pines, and is considered sensitive to the condition of this habitat in northern Wisconsin.

Blue-winged Warbler

Vermivora cyanoptera

• Identification: Small songbird with bright yellow underparts and crown, a bold black eye-line, yellow-green upperparts, blue-gray wings with two clear white wingbars, and a slender, pointed bill.
• Field recognition: Often identified by the male’s buzzy “bee-buzz” song and by deliberate foraging low in shrubs and young trees, where it gleans insects and spiders from foliage.
• Where found: Occurs across much of southern Wisconsin during summer, most common in the southwestern quarter, favoring shrubby fields, second-growth woods, pastures, woodland edges, and forest openings.
• Conservation status: Least Concern (IUCN); populations appear stable in Wisconsin, although loss of early- and mid-successional shrub habitat remains a concern.

The Blue-winged Warbler is a distinctive yellow warbler of brushy and early-successional habitats in southern Wisconsin, with its strongest presence in the southwestern part of the state. It measures 11 to 12 centimeters (4.3 to 4.7 inches) in length and has a compact body, sharp pointed bill, and relatively long tail. Adult males show bright yellow underparts and crown, a bold black eye-line, and yellow-green upperparts. The blue-gray wings contrast with two prominent white wingbars, while females and immatures follow the same basic pattern but appear duller, with a more olive-toned crown, grayer eye-line, and less contrasting wingbars.

Blue-winged Warblers are often confirmed by the male’s thin, buzzy “bee-buzz” song, which carries across open shrubland during the breeding season. They forage deliberately through shrubs and young trees, where they glean insects and spiders from leaves, twigs, and lower branches and may hang upside down while searching foliage. Birds typically remain among dense vegetation but may sing from exposed perches, which provides good opportunities to see the bright yellow plumage and contrasting blue-gray wings. A gentle “tzip” call can also reveal birds hidden in cover.

The Blue-winged Warbler occurs throughout much of the southern half of Wisconsin, including the Baraboo Hills, and is most common in the southwestern quarter of the state. It is an uncommon migrant and a fairly common breeder in southern and western regions, with spring arrival mainly from early through late May and fall movement extending into September. The species uses second-growth woods, willow swamps, shrubby overgrown fields, pastures, woodland edges, glades, and forest openings with mixtures of young trees, shrubs, grasses, and other low vegetation. Wisconsin populations appear stable, but advancing forest succession and suburban development reduce the early- and mid-successional habitats on which the species depends.

Yellow-throated Vireo

Vireo flavifrons

• Identification: Small, chunky songbird with olive-green upperparts, a contrasting gray rump, bright yellow throat, breast, and “spectacles,” a clean white belly, and two bold white wingbars.
• Field recognition: Usually detected high in mature deciduous trees by its slow, deliberate foraging and burry, emphatic song delivered from the canopy.
• Where found: Occurs throughout Wisconsin during summer, but is less common in the north, favoring mature oak woodlands, open floodplain forests, forest edges, and stream corridors with large trees and relatively sparse understory.
• Conservation status: Least Concern (IUCN); populations are increasing in Wisconsin, although forest fragmentation can reduce suitable breeding habitat.

The Yellow-throated Vireo is a distinctive yellow bird of Wisconsin’s mature deciduous forests, where its bright yellow face and throat contrast sharply with a white belly. It measures 13 to 15 centimeters (5.1 to 5.9 inches) in length and appears larger and more thickset than most other vireos, with a large head, thick neck, and stout bill. Adults show olive-green upperparts with a contrasting gray rump, dark wings with two broad white wingbars, and bright yellow “spectacles” surrounding the eyes and connecting with the yellow throat and breast. The belly and undertail coverts are clean white. Sexes are alike, while immatures are similar but paler and show duller yellow on the throat and breast.

Yellow-throated Vireos are usually detected by their persistent song because they spend much of their time in the middle and upper levels of mature trees. They move slowly and deliberately along branches and foliage, often pausing before hopping to another perch, and search leaves and branches for insects or make short sallies after prey. Seasonally available berries also supplement their largely insect-based diet. Males give a series of short, burry, emphatic phrases separated by pauses, which often reveals their presence even when the birds remain difficult to see in the canopy.

The Yellow-throated Vireo has been recorded throughout Wisconsin and is a fairly common migrant and breeder across much of the state, but becomes uncommon in the north as suitable deciduous habitat decreases. Birds arrive mainly from late April or early May through May, while fall movement occurs from late August through late September. The species favors mature deciduous woods with little understory, particularly oak-dominated woodlands and mature, open southern floodplain forests, and also occurs along forest edges and streams; breeding territories in southern Wisconsin contain more large trees and white oaks and fewer medium-sized shrubs than surrounding forest. Populations are increasing in Wisconsin, although fragmentation of large deciduous forests can reduce suitable breeding habitat.

Wilson’s Warbler

Cardellina pusilla

• Identification: Small songbird with lemon-yellow underparts and a yellowish olive back; males show a crisp black cap that contrasts with a bright yellow face and black eye.
• Field recognition: Usually noticed as a bright yellow bird flitting restlessly through low shrubs, with frequent tail-flicking, quick movements, and a loud, rapid, chatter-like song.
• Where found: Occurs across Wisconsin during migration in riparian woods, willow and alder thickets, bogs, wet shrubby meadows, and occasionally garden shrubbery; a very casual breeder in the north.
• Conservation status: Least Concern (IUCN); primarily a migrant in Wisconsin and only a very casual breeder in the northern part of the state.

The Wilson’s Warbler is a fairly common yellow warbler seen in Wisconsin during spring and fall migration, when its bright plumage can stand out strongly in dense shrubs and wet thickets. It measures 10 to 12 centimeters (3.9 to 4.7 inches) in length and has a compact, round-bodied appearance, with a relatively large head, small thin bill, and long, thin tail. The face and underparts are lemon yellow, while the upperparts are yellowish olive green. Adult males are especially distinctive because a crisp black crown patch forms a well-defined cap above the bright yellow face and conspicuous black eye. Females are similar but duller, with variable amounts of black on the crown.

Wilson’s Warblers are usually detected as bright yellow birds that dart restlessly through the understory and shrub thickets, often in wet habitats. They hop rapidly between perches and frequently flick or wave the tail while searching foliage, and their short flights through dense vegetation are quick and direct. They feed on insects by gleaning vegetation, hovering near foliage, and making short flycatching sallies. Males also give a loud series of rapid, chatter-like notes that drops in pitch toward the end, while a soft “chip” call can reveal birds hidden among leaves.

In Wisconsin, the Wilson’s Warbler occurs primarily as a migrant and is fairly common in May and again in late summer and fall. Fall migration extends from about August 20 through October 5, with the main passage from late August through September. Migrants use riparian woodlands, willow and alder thickets, bogs, wet shrubby meadows, and occasionally garden shrubbery. The species is only a very casual breeder in northern Wisconsin, so most birds encountered in the state are passage migrants.

Prothonotary Warbler

Protonotaria citrea

• Identification: Small songbird with a thick bill and short tail; adults show a rich golden-yellow head and underparts contrasting with an olive-green back, blue-gray wings and tail, a solid black eye, and white undertail and tail spots.
• Field recognition: Most often noticed as a brilliant yellow bird moving low through wooded wetlands, hopping along branches, trunks, or floating debris over water and giving a loud series of ringing repeated notes.
• Where found: Occurs locally in southern Wisconsin during summer, especially along the Mississippi, lower St. Croix, and lower Wisconsin rivers, in flooded bottomland forests and wooded deciduous swamps.
• Conservation status: Least Concern (IUCN); a regular but localized Wisconsin breeder vulnerable to the loss and degradation of forested wetlands and suitable cavity-bearing trees.

The Prothonotary Warbler is one of Wisconsin’s most intensely yellow warblers and a localized specialty of the state’s wooded river floodplains and swamps. It measures 13 to 15 centimeters (5.1 to 5.9 inches) in length and has a robust build with a large head, relatively heavy pointed bill, short legs, and short tail. Adult males show an intense golden- to orange-yellow head and underparts set against an olive-green back and blue-gray wings and tail. The plain yellow face has a prominent black eye, while the lower belly and undertail coverts are white and the outer tail feathers have large white patches. Females are similar but slightly duller, with more green on the crown and nape.

Prothonotary Warblers are often detected by their brilliant yellow plumage as they forage slowly and deliberately through the lower levels of wooded wetlands. They glean insects and other small prey from vegetation, hop along branches and floating debris, and may creep along tree trunks while searching for food; small mollusks also form part of the diet. Their low flights across water or gaps in the forest can reveal flashes of white in the tail. Males also advertise their presence with a loud, ringing series of repeated notes that carries through swamp forests and often makes the birds easier to locate.

Wisconsin lies at the northern edge of the Prothonotary Warbler’s breeding range, and the species is a regular but localized breeder in the southern half of the state. It is fairly common along the Mississippi and lower St. Croix rivers, occurs locally along the lower Wisconsin River and Wolf River, and is rare elsewhere in southern and central Wisconsin. Birds arrive from late April through May and remain into early September, occupying wooded deciduous swamps and seasonally flooded or permanently wet bottomland forests with slow-moving water, large forest tracts, sparse understory, and dead trees that provide nesting cavities. The species is vulnerable to the loss and degradation of floodplain forests, removal of suitable cavity-bearing trees, altered river systems, and invasive plants that affect wetland forest regeneration.

Evening Grosbeak

Hesperiphona vespertina

• Identification: Medium-sized songbird with a massive conical bill and short tail; adult males show bold yellow and black plumage with a bright yellow forehead and eyebrow and a large white wing patch; females are mostly gray with subtle yellow highlights.
• Field recognition: Often noticed in flocks by loud, sharp calls, a bulky shape and oversized bill, and frequent visits to sunflower feeders during irregular fall and winter movements.
• Where found: Occurs irregularly during migration and winter across Wisconsin; also occurs as an uncommon breeder in the north; uses coniferous and mixed forests as well as woodlands, parks, gardens, and feeders outside the breeding season.
• Conservation status: Vulnerable (IUCN); an uncommon breeder in northern Wisconsin and an irregular winter visitor whose abundance can vary greatly between years.

The Evening Grosbeak is a striking yellow-and-black finch, although its irregular movements make encounters unpredictable in Wisconsin, especially outside its northern breeding range. It measures 16 to 22 centimeters (6.3 to 8.7 inches) in length and has a thick neck, full chest, short, slightly notched tail, and massive conical bill. Adult males show a dark brown to black head with a vivid yellow forehead and eyebrow, along with yellow on the scapulars, rump, and parts of the underparts. The black wings and tail contrast with a large white inner-wing patch that becomes particularly conspicuous in flight. Females are much more subdued, with mostly grayish-brown plumage, subtle yellow on the sides of the neck and flanks, and smaller white markings in the wings and tail.

Evening Grosbeaks are often detected by their loud, piercing calls as flocks move between treetops, feeding areas, and the ground. Their strongly undulating flight, bulky shape, and oversized bill provide useful identification clues even when the yellow plumage cannot be seen clearly. They search the ground and vegetation for seeds, buds, berries, and insects and readily visit feeders for sunflower seeds. In Wisconsin, feeders can provide especially good opportunities to see the species during migration and winter, when groups may appear in parks and gardens.

The Evening Grosbeak is an uncommon breeder in northern Wisconsin, where it uses coniferous and mixed forests and woodlands, with occasional occurrence in deciduous woods, suburban parks, and orchards. Elsewhere in the state it is primarily an irregular migrant and winter visitor from mid-October to mid-May, with numbers ranging from uncommon to common depending on the year. Winter birds use forests and woodlands as well as parks and gardens with feeders, and feeders in northern and central Wisconsin provide some of the best opportunities for encounters during seasonal movements.

Identifying Yellow Birds in Wisconsin

Wisconsin’s yellow birds become easier to separate when plumage pattern is paired with behavior and habitat. American Goldfinches combine vivid breeding color with black wings and bounding flight, Northern Yellow Warblers are extensively yellow with chestnut streaks on adult males, and Common Yellowthroats stay low in dense wetland vegetation. Eastern and Western Meadowlarks share bright yellow breasts and black chest markings, but habitat preferences and especially their different songs help distinguish these similar grassland birds.

Season and location provide additional clues. Pine and Nashville Warblers are closely associated with northern and central forest habitats during the breeding season, Blue-winged Warblers favor shrubby landscapes mainly in the south and west, and Prothonotary Warblers are localized around wooded river floodplains. Wilson’s Warblers occur chiefly during migration, while Evening Grosbeaks appear much less predictably. Combining the distribution of yellow with facial patterns, wing and tail markings, voice, movement, habitat, and season offers the most reliable route to identification.

For a broader perspective, explore our guide to yellow birds across North America, and visit the Birds of Wisconsin and Birds of the United States pages for additional regional and national bird guides.