ML201859571 IBC 1532094
投稿者
日付
場所
- 年齢
- 指定なし
- 性別
- 指定なし
視聴覚メディア・ノート
Crested Terns fend off marauding Silver Gulls from their rookery. Crested Terns (Thalasseus bergii) breed in several rookeries on Penguin Island, part of the Shoalwater Islands Marine Park 50 km south of Perth, Western Australia. Losses of chicks and eggs are high, particularly by predation from Silver Gulls (Chroicocephalus novaehollandiae). The adult Terns sit tight on their nests, calling as the Gulls hover overhead or stand nearby, waiting for an opportunity to grab an egg or a small chick. Silver Gulls also harass adult Terns returning with fish for their chicks, repeatedly chasing them and often preventing them from landing at their nest. Elevation: 11 m. Date added to IBC: November 20, 2018.
観察結果の詳細
IBC scientific name: Thalasseus bergii gwendolenae.
コレクション
テクニカル・インフォメーション
- カメラ
- マイク
- アクセサリ
- オリジナルのファイルサイズ
- 88.54 MB