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The common tern [2] (Sterna hirundo) is a seabird in the family Laridae. This bird has a circumpolar distribution, its four subspecies breeding in temperate and subarctic regions of Europe, Asia and North America. It is strongly migratory, wintering in coastal tropical and subtropical regions. Breeding adults have light grey upperparts, white ...
[5] [51] The Inca tern nests in crevices, caves and disused burrows, such as that of a Humboldt penguin. [52] The white tern is unique in that it lays its single egg on a bare tree branch. [53] Tropical species usually lay just one egg, but two or three is typical in cooler regions if there is an adequate food supply.
Other names for the species include angel tern and white noddy in English, and manu-o-Kū in Hawaiian. in the Cook Islands, it is known as the kakaia. The little white tern ( Gygis microrhyncha ), previously considered a subspecies of the white tern ( Gygis alba microrhyncha ), is now recognised as a separate species.
Breeding plumage Eggs, Collection Museum Wiesbaden. The royal tern nests on island beaches or isolated beaches with limited predators. It lays one or two eggs, usually in a scrape, an area on the ground where a tern has made a small hole to lay its eggs. In some cases, tern eggs are laid directly on the ground, not in a scrape.
The little tern breeds in colonies on gravel or shingle coasts and islands. It lays two to four eggs on the ground. Like all white terns, it is defensive of its nest and young and will attack intruders. Like most other white terns, the little tern feeds by plunge-diving for fish, either in coastal saline environments, or inland, along larger ...
This species breeds in colonies on lakes, marshes and coasts. It nests in a ground scrape and lays two to five eggs. This is a somewhat atypical tern, in appearance like a Sterna tern, but with feeding habits more like the Chlidonias marsh terns, black tern and white-winged tern.
The size of an egg is on average 46 × 33 mm. [2] The clutch is cared for by both male and female, with an incubation period of approximately 24 days. [2] Adults will continue to join the colony and lay eggs from October–January. [13] White-fronted tern chick hiding on the ground. The colour of the chicks is highly variable.
The Sandwich tern is a medium-large tern with grey upperparts, white underparts, a yellow-tipped black bill, and a shaggy black crest which becomes less extensive in winter with a white crown. Young birds bear grey and brown scalloped plumage on their backs and wings. It is a vocal bird. It nests in a ground scrape and lays one to three eggs.