Brown-headed Cowbird
Molothrus ater
 (L 7.5" WS 12" WT 1.5 oz)
7May05
7Jul09
MortonArboretum 2Jul09
 Lisle, IL 6May06
Does not build its own
nests...been found to use the
nests of 220 other species.
female
s
   McKinley St Pk, IL
   19Aug10
juveniles