Starling, 47; Case 2, Figs. 24, 25

Swallow, Bahama Bank, 84; Case 6, Fig. 54

Barn, 83; Case 5, Fig. 32

Chimney. _See_ Swift, Chimney

Cliff, 82; Case 6, Fig. 55

Eaves. _See_ Swallow, Cliff

Rough-winged, 84; Case 6, Fig. 56

Tree, 83; Case 5, Fig. 24

White-bellied. _See_ Swallow, Tree

What bird is that? · 第 381 / 399 题