A little Chestnut

I love it when I can catch one on flight. They are so fast and tiny.

Chestnut-sided Warbler (Setophaga pensylvanica), Central Park May 6, 2019

Squeaky B & W

Black-and-White Warbler breeds in northern and eastern North America and winters in Florida, Central America, and the West Indies down to Peru. One of its calls is so high pitched I need my hearing aids to hear it:
www.allaboutbirds.org/guide/Black-and-white_Warbler/sounds
This one was passing through Central Park.

Black-and-white Warbler (Mniotilta varia), Central Park 5/6/2019
Black-and-white Warbler (Mniotilta varia), Central Park 5/6/2019