Although variable, all yellow-rumped warblers possess a bright yellow rump, which is shared with only 2 other species. The yellow-rumped’s unique ability to digest the waxes in bayberries allows ...

For now, the varying forms of the bird are labeled as subspecies of yellow-rumped warblers. Keeps things simple. But I hoped to return to calling the birds in my yard myrtle warblers, a classier ...