崖沙燕是一种褐羽白腹的鸟。
The sand martin is a brown bird with white underneath
四川南充崖沙燕的洞巢生物学
Burrow Nest Biology of Sand Martin in Nanchong , Sichuan
崖沙燕繁殖期雄鸟的占巢行为
Behavior of Occupying Nest of Riparia riparia
崖沙燕崖沙燕崖沙燕