國際鳥類典藏 (IBC, Internet Bird Collection) 國際鳥類典藏 (IBC, Internet Bird Collection) 探索收藏
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ML201859571 IBC 1532094

Great Crested Tern Thalasseus bergii

報告

提供者

日期

eBird 紀錄清單 S65200163

地點

Penguin Island
Rockingham, Western Australia, Australia
來自這個地點的影音 影音名錄
地圖
地圖 座標: -32.305706, 115.6908417
年齡
未確定
性別
未確定

影音備註

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.

觀察細節

IBC scientific name: Thalasseus bergii gwendolenae.

蒐藏

國際鳥類典藏 (IBC, Internet Bird Collection)

技術資訊

相機
麥克風
配件
原始檔案大小
88.54 MB