The Kentucky warbler is a
very striking bird, with a bright yellow underside and strong black
markings on its
face. Unfortunately, it's not a terribly common bird at Magee
Marsh;
the best chance of seeing one is from the last week of April through
the second week of May, with the peak occurring toward the end of that
interval.
Click to zoom
painting by L.A. Fuertes (1917)
photo by USFWS
The Wikipedia page for this species is embedded below: