wilson`s warbler cardellina pusilla is a small new world american warbler, greenish above and yellow below, with rounded wings

america animal avian beak beautiful bird birding birds birdwatching black branch canada cardellina costa crown environment feather green greenish male migrant migratory natural nature new north ornithology outdoors parulidae passeriformes passerine perched perching pusilla rica small songbird tail tree warbler wild wildlife wilson wilsons wing wings world yellow