© Wikimedia Commons
白腰燕鸥
Aleutian Tern
Onychoprion aleuticus
形态与习性
The Aleutian tern (Onychoprion aleuticus) is a migratory bird living in the subarctic region of the globe most of the year. It is frequently associated with the Arctic tern, which it closely resembles. While both species have a black cap, the Aleutian tern may be distinguished by its white forehead (although juvenile Arctic terns also have white foreheads). During breeding season, the Arctic terns have bright red bills, feet, and legs while those of the Aleutian terns are black. Onychoprion aleu
体长
未知
体重
112 g
观鸟指南
1
2
3
4
5
6
7
8
9
10
11
12
最佳时段:清晨 6-9 点