Spotted on power line above hay field in Western Maine, U.S.
In flight the white back was quite prominent. Otherwise it's black with the yellow crown.
What the heck is it? Guess I should know.
p.s.
My momma phoebe is back, using last years nest this time, about 20 feet away on the other end of our front porch. 4 eggs this time. All hers!
