Black-legged Kittiwake vs African Skimmer
Rissa tridactyla 对比 Rynchops flavirostris
Side-by-Side Comparison
| 属性 | Black-legged Kittiwake | African Skimmer |
|---|---|---|
| 学名 | Rissa tridactyla | Rynchops flavirostris |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Least Concern |
| 体长 | — | — |
| 翼展 | 60.2 cm (23.7 in) | 66.4 cm (26.1 in) |
| 体重 | 439.3333333333333 g (15.50 oz) | 165.66666666666666 g (5.84 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-3 | 1-5 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Black-legged Kittiwake
Least Concern
African Skimmer
About These Birds
Black-legged Kittiwake
三趾鸥（约400克）是一种典型的海洋性鸥类，在陡峭悬崖上筑巢，在大洋上度过非繁殖季节。翅尖纯黑，后趾退化（由此得名）。以鱼类和浮游动物为食。易危；近几十年来某些种群数量大幅下降，可能与鱼类减少和气候变化有关。
African Skimmer
African Skimmer: 36–42 cm, black-and-white skimmer with a long bright orange-yellow bill where the lower mandible is longer than the upper. Flies low over large rivers and lakes, cutting the water surface with the lower bill to catch fish. Resident and partial migrant along large rivers and lakes of sub-Saharan Africa. NT.