Northern Beardless-Tyrannulet illustration
Birdsong field guide

Northern Beardless-Tyrannulet

Camptostoma imberbe

A small, inconspicuous flycatcher of the American tropics and desert Southwest, recognized by its bushy crest and active, warbler-like foraging behavior.

What it sounds like

A thin, high-pitched, descending series of whistled notes, often transcribed as 'pee-ye-ye-ye'.

Reference call, compare with what you heard
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Rec. Albert Lastukhin · Costa RicaCC BY-NC-NDXeno-canto

Field notes

  • The species name 'imberbe' translates to 'beardless,' denoting its unique lack of the rictal bristles typically found around the bills of other tyrant flycatchers.
  • It constructs a complex, globular nest with a side entrance, often camouflaging it within clumps of ball moss or mistletoe.
  • Unlike many flycatchers that sally for insects in mid-air, this species primarily gleans prey from foliage and regularly consumes small berries.
  • It is frequently mistaken for a Verdin or Ruby-crowned Kinglet due to its small size, drab plumage, and habit of constantly flicking its tail upward.
  • It represents the northernmost reach of its predominantly South American genus, barely crossing the border into southern Arizona and Texas.
Habitat
Arid scrublands, mesquite thickets, and riparian woodlands.
Range
Southwestern United States through Mexico and Central America to northwestern Costa Rica.

Similar & commonly confused birds

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