aInformation from Science Advisory Workgroup and Nebraska Partnership for All Bird Conservation, except as noted.
b1 = threatened or endangered; 2 = high concern (PIF score, ≥ 24); 3 = moderate concern (PIF score, 20-23); 4 = concern or edge of range.
cInformation from J. Dinan, NGPC. B = breeding; M = migrant; W = wintering.
dOpen habitat is characterized by absence of trees. Partial habitat is characterized by widely scattered trees where canopies do not often touch and shrubs may be present but are not impenetrable. In closed habitat, tree canopies frequently touch, and understory vegetation can be very thick.