Yellow Tyrannulet

Yellow Tyrannulet

Summary:

Profile Yellow Tyrannulet
[Authority] Lichtenstein, 1823 | [group] Tyrant-flycatchers | [order] PASSERIFORMES | [family] Tyrannidae | [latin] Capsiempis flaveola | [UK] Yellow Tyrannulet | [FR] Tyranneau flaveole

[Authority] Lichtenstein, 1823 | [group] Tyrant-flycatchers | [order] PASSERIFORMES | [family] Tyrannidae | [latin] Capsiempis flaveola | [UK] Yellow Tyrannulet | [FR] Tyranneau flaveole | [DE] Brauen-Fliegenstecher | [ES] Mosquerito Amarillo | [NL] | copyright picture

The Yellow Tyrannulet is 10.5-11.4 cm long, weighs 8 g, and with its slender build and small bill resembles a tiny vireo or warbler. Its upperparts are olive-green and the underparts are bright yellow. The head has whitish or pale yellow supercilia. The wings and tail are dusky brown with weak yellow feather-edging, and there are two yellowish wing bars. Sexes are similar, but young birds are browner above and paler yellow below.

This species is found in thickets, forest and streamside edges, dense second growth, and bushy pastures or clearings.

It breeds from Nicaragua south to northeastern Argentina and southeastern Brazil. It is the only member of the genus Capsiempis, but its taxonomy is uncertain, and it has been allocated to at least three other genera in the past.

Yellow Tyrannulets are active birds, seen in pairs or family groups feeding on insects, spiders and small berries. The prey is gleaned from foliage or taken in short sallies.


This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern. [conservation status from birdlife.org]


The cup nest is made of plant fibre and grass blades, decorated outside with moss. It is placed 2-7 m high in a tree, shrub, or maize plant. The typical clutch is two white eggs, usually umarked or with very light rufous speckles.

Sedentary throughout range.

Specification

  1. Measurements
  2. spanwidth min.: 0 cm
  3. spanwidth max.: 0 cm
  4. size min.: 10 cm
  5. size max.: 11 cm
  6. Breeding
  7. incubation min.: 0 days
  8. incubation max.: 0 days
  9. fledging min.: 0 days
  10. fledging max.: 0 days
  11. broods 1
  12. eggs min.: 1
  13. eggs max.: 3
  14. Conservation Status
  15. Yellow Tyrannulet status Least Concern

Subspecies

  1. Polystictus flaveola
  2. Capsiempis flaveola flaveola
  3. Capsiempis flaveola magnirostris
  4. Capsiempis flaveola leucophrys
  5. Capsiempis flaveola amazona
  6. Capsiempis flaveola cerula
  7. Capsiempis flaveola semiflava
  8. Capsiempis flaveola
  9. LA s Nicaragua to e Brazil
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