Contopus cooperi
The Olive-sided Flycatcher is the general of the snag line: a big, bull-headed flycatcher that claims the tallest dead branch in sight and launches long aerial strikes at passing insects, almost always returning to the same commanding perch. Its dark vest over a white center gives the classic unbuttoned-jacket look.
Famous for the whistled song quick-THREE-BEERS, it breeds in northern and mountain conifer forests and passes through Texas in migration. It is also one of North America's fastest-declining songbirds, making every encounter feel a little more precious.
This bird was photographed at Devine Lake Park in Leander on spring migration, commanding the tallest snag over the pond.
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