108 BIRDS THROUGH AN OPERA-GLASS. 
Birds whose general build is compact but slen- 
der, and by whom the claw is used for holding 
food. (Compare with robin and sparrows. ) 
Oriole. 
Crow blackbird. 
Red-winged blackbird. 
Birds in which the females are smaller than the 
males. 
Red-winged blackbird. 
Cowbird. 
Meadow-lark. 
Crow blackbird. 
Birds with long straight bills. (Compare with 
swift, chickadee, finches, and sparrows. ) 
Crow blackbird. 
Red-winged blackbird. 
Meadow-lark. 
Oriole. 
Birds that walk instead of hopping. (Compare 
with flycatchers, sparrows, etc. ) 
Crow blackbird. 
Red-winged blackbird. 
Cowbird. 
Meadow-lark. 
