Palm Warbler

Setophaga palmarum

Also Known As

• Wagtail Warbler
• Tip-up Warbler
• Bijirita común (Spanish)
• Reinita coronicastaña (Spanish)

About

The Palm Warbler is unusual among the Western Hemisphere’s wood-warbler family. While the majority of warblers are sexually dimorphic, with males noticeably brighter in the breeding season, the male and female Palm Warbler are nearly identical, and can be impossible to tell apart. Warblers, in general, spend a majority of their time in trees and shrubs, but the Palm Warbler is quite comfortable on the ground. Rather than hopping like their arboreal relatives, these birds take to walking or running. Like other warblers, the Palm Warbler often joins mixed-species flocks outside of the breeding season. However, though most warblers tend to flock up with other arboreal species, the Palm Warbler is just as likely to be found foraging with sparrows along hedgerows and in open weedy fields.

Palm Warblers share another habit more typical of ground-dwelling birds in that they continuously bob their tails. This behavior is also seen in other birds typical of open habitats, including the Spotted Sandpiper and Black Phoebe, where the rate of bobbing is thought to vary with the bird’s level of excitement, and thus plays a role in communication. In many ways, the Palm Warbler behaves more like a sparrow or pipit than a typical wood-warbler — even its monotonous trilled song is remarkably similar to that of a Dark-eyed Junco or Chipping Sparrow. Though perhaps an oddball among its own family, this unique bird has found a niche all its own, somewhere between a sparrow and a warbler. (snip-MORE)