Wilson's warbler (male)
Wilsonia pusilla

Size: 4.75 inches
Overall Color: olive
Occurrence: near water
Diet: insects, berries
Nest: cup on ground
Field Identification: black cap, yellow face, neck, belly and rump;hyperactive
Season: spring, fall

Kingdom: Animalia (Animals)
Phylum: Chordata (hollow nerve cord)
Subphylum: Vertebrata (backbone)
Class: Aves (Birds)
Order: Passeriformes
Family: 78 Parulidae (wood warblers)
Genus: Wilsonia
Species: pusilla