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A rookery is a colony breeding rooks, and more broadly a colony of several types of breeding animals, generally gregarious [1] birds. [ 2 ] Coming from the nesting habits of rooks, the term is used for corvids and the breeding grounds [ 3 ] of colony-forming seabirds , marine mammals ( true seals or sea lions ), and even some turtles .
Emperor penguins with chicks. Taylor Rookery is an emperor penguin breeding colony in Antarctica. It is the larger of the two known entirely land-based colonies of the species, most of which are situated on sea ice. [1] It is important because it is probably the largest colony of the species to occur on land and has been regularly monitored. [2]
This is a list of little penguin colonies notable for their size, location or public profile. It is not exhaustive. It is not exhaustive. Some little penguin ( Eudyptula minor ) colonies are particularly large, well-known, or are tourist attractions; even small colonies in urban areas may attract tours.
Colony-nesting birds often show synchrony in their breeding, meaning that chicks all hatch at once, with the implication that any predator coming along at that time would find more prey items than it could possibly eat. [2] [5] Common murre colony (Farallon Islands). What exactly constitutes a colony is a matter of definition.
In 1994, a penguin from Auster rookery reached a depth of 564 m (1,850 ft); the entire dive took him 21.8 min. [61] Both male and female emperor penguins forage for food up to 500 km (310 mi) from colonies while collecting food to feed chicks, covering 82–1,454 km (51–903 mi) per individual per trip.
Emperor penguins near grounded icebergs at Auster Rookery, Antarctica. Auster Rookery is an Emperor penguin rookery on sea-ice, sheltered by grounded icebergs, 5 kilometres (2.7 nmi) east of the Auster Islands, and about 51 kilometres (28 nmi) ENE of Mawson Station in Antarctica.
A small, freely-moving projection on the anterior edge of the wing of modern birds (and a few non-avian dinosaurs)—a bird's "thumb"—the word is Latin and means 'winglet'; it is the diminutive of ala, meaning 'wing'. Alula typically bear three to five small flight feathers, with the exact number depending on the species.
Adélie penguins also manage their salt intake by concentrating cloacal fluids to a much higher degree than most other birds are capable. This ability is present regardless of ontogeny in Adélie penguins, meaning that both adults and juveniles are capable of withstanding extreme levels of salt ion concentration. [48]