2023年11月30日 · We investigated sleep in chinstrap penguins (Pygoscelis antarcticus) nesting in a colony exposed to a predatory bird, the brown skua (Stercorarius antarcticus), on King George Island, Antarctica. During incubation, skuas are known to prey on penguin eggs mainly on the border of the colony (13).

Basic facts about South Polar Skua: lifespan, distribution and habitat map, lifestyle and social behavior, mating habits, diet and nutrition, population size and status.

We investigated sleep in chinstrap penguins (Pygoscelis antarcticus) nesting in a colony exposed to a predatory bird, the brown skua (Stercorarius antarcticus), on King George Island, Antarctica. During incubation, skuas are known to prey on penguin eggs mainly on the border of …

The skuas range in size from the long-tailed skua, Stercorarius longicauda, at 310 grams (0.68 pounds), to the brown skua, Stercorarius antarcticus, at 1.63 kg (3.6 lb). On average, a skua is about 56 cm (22 in) long, and 121 cm (48 in) across the wings. They have longish bills with a hooked tip, and webbed feet with sharp claws.

Often a visitors first sight of a skua is at a penguin colony where they usually are nesting nearby. They hang around as a dark presence looking for unguarded eggs or weak or isolated chicks to prey on, which is a very productive means of finding food, but does their reputation no good at all. Displaying Skuas

2023年11月30日 · Why would the birds adopt this fascinating sleep cycle? The constant vigilance may help keep the nests safe from predators like the brown skua bird, which feeds on penguin eggs and chicks....

大賊鷗 （學名： Stercorarius skua）是 賊鷗科 賊鷗屬 的一種候鳥，分佈於大西洋北至中部沿岸地區。 成鳥數量約有32,600-34,500隻 [2]。 繁殖於挪威至 斯瓦爾巴群島 、 法羅群島 到丹麥、冰島、蘇格蘭和其周邊群島。 通常在法國和 伊比利亞半島 的 大西洋 海岸越冬，年青的更可以飛到 佛得角 、巴西海岸和加勒比地區，小數在加拿大 紐芬蘭大淺灘 越冬 [3]。 喙前端鈎曲。 頭、頸及胸部以下皆為暗灰褐色，背暗褐色。 初級飛羽基本白色，中央尾羽略長而尖。 大部份時間是在 …

We found (using radio-transmitters) that skuas regularly forage at night and (using light intensifying equipment) observed them catching storm-petrels at night. However, skuas also foraged during daylight hours, and it is un-known whether they might also catch storm-petrels at …

Researchers who repeatedly wear the same clothing, backpack, or even sunglasses can be identified and attacked on their way to nesting sites. These skua attacks are far from pleasant. The skua parent first makes "alarm calls," loud vocalizations that …

We found (using radio-transmitters) that skuas regularly forage at night and (using light intensifying equipment) observed them catching storm-petrels at night. However, skuas also foraged during daylight hours, and it is unknown whether they might also catch storm-petrels at …