The Cottonwood tree that attracted so many warblers in Arizona in late November hosted lots of different warbler species including this Northern Parula, which until that day in Arizona, I’d only seen onae in Ohio at Magee Marsh as many species of Warbler migrated north across Lake Erie to their nesting grounds. The beak of this Northern Parula is covered with tiny aphids. Those tiny bugs probably stuck to the outside of its beak, instead of being swallowed, because as the bird scooped up the bugs, its beak became coated with the sticky honeydew that aphids secrete.
Excellent!