Yellow-rumped Warbler

About the Yellow-rumped Warbler

The Yellow-rumped Warbler is the hardy, abundant warbler of the cold months, and for many birders it is the default winter warbler across Texas. Even in drab winter plumage it flashes its namesake bright yellow rump - the field mark that earned it the affectionate nickname butter-butt. Spring males transform into crisp gray, black, and white birds studded with yellow on the rump, sides, and crown.

What sets this warbler apart is its diet: unlike most warblers, it can digest the waxy berries of wax myrtle, juniper, and poison ivy, which lets it winter far north of its insect-eating cousins. Restless and active, it flits through trees and shrubs, sallies after insects, and gathers in loose, chipping flocks.

In Texas it is common and widespread from fall through spring, working woodland edges, brush, and suburban trees almost anywhere in the state.

A note from behind the lens: their abundance and constant motion make them great practice - and that yellow rump is a reliable splash of color. Find a berry-laden shrub or a sunny edge, prefocus, and catch one in the brief pause between hops.