Common yellowthroat

Description:

The Common Yellowthroat is far more frequently heard than seen. They are small songbirds that have olive backs, wings and tails, yellow throats and chests, and white bellies. Adult males have black face masks which stretch from the sides of the neck across the eyes and forehead, which are bordered above with white or gray. Females are similar in appearance, but have paler underparts and lack the black mask. Immature birds are similar in appearance to the adult female. First-year males have a faint black mask which darkens completely by spring. They nest in low areas of the vegetation, laying 3–5 eggs in a cup-shaped nest. Both parents feed the young.

Habitat:

Its "wich-i-ty, wich-i-ty, wich-i-ty" can be heard from the Yukon to Newfoundland, and from southern Florida to southern Mexico. Seen at Mason Farm Nature Preserve

Notes:

As far as I could see, this bird was all alone but he was singing his little heart out, flitting from tree to tree and bush to shrub.