Yellow-rumped Warblers (Dendroica coronata) are common here in Tucson during migration, especially in riparian areas, but even though I see quite a few of these active, little warblers, they have been frustratingly hard for me to photograph.

It can be difficult to get a clear photo of these arboreal warblers because they are usually partly hidden by leaves, and even when they come out into the open, it's often for only for the briefest of moments.

These active birds are always on the move searching for insects and spiders among the trees. Perhaps it's easier to photograph these birds where they are wintering or breeding, but during migration, they don't seem to rest for a minute.

Yellow-rumped Warblers come in two forms, the Myrtle form with a white throat and the Audubon's form like these with a yellow throat. Both forms of Yellow-rumped Warbler are mainly white, black, and gray with white crescents above and below the eyes, yellow patches on their sides, a yellow-topped rump (not pictured), and a yellow crown patch which can barely be seen in the above photo.