Northern Beardless-Tyrannulet

Camptostoma imberbe

The northern beardless tyrannulet is a small passerine bird in the tyrant flycatcher family. It breeds from southeasternmost Arizona and Texas of the United States through Mexico and Central America to northwestern Costa Rica. Source

Where it is now

In the last 8 weeks this bird was recorded 51 times across 4 areas (each area is a 5 degree square).

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Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.