Yellow Warbler (Dendroica petechia)
Although similar to the goldfinch, this warbler lacks the black wings
and tail. Its cheerful, bright call can be heard by urban dwellers from
willows, small trees, and shrubs growing on wet grounds and in
residential areas that contain an open growth of small ornamental
trees.
A tropic winterer, he breeds from the tree limit in Canada to the
southern states. When plagued by cowbirds laying eggs in its nest,
this warbler builds a second nest on tip of the first, completely
covering the cowbird's eggs, and any of its own in the bottom layer.