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Grootsterretjie
(Hydroprogne caspia)
The Caspian tern (Hydroprogne caspia) is a species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic of its genus, and has no accepted subspecies. The genus name is from Ancient Greek hudros, "water", and Latin progne, "swallow". The specific caspia is from Latin and, like the English name, refers to the Caspian Sea.
It is the world's largest tern with a length of 48–60 cm (19–24 in), a wingspan of 127–145 cm (50–57 in) and a weight of 530–782 g (18.7–27.6 oz). Adult birds have black legs, and a long thick red-orange bill with a small black tip. They have a white head with a black cap and white neck, belly and tail. The upper wings and back are pale grey; the underwings are pale with dark primary feathers. In flight, the tail is less forked than other terns and wing tips black on the underside. In winter, the black cap is still present (unlike many other terns), but with some white streaking on the forehead. The call is a loud heron-like croak.
Their breeding habitat is large lakes and ocean coasts in North America (including the Great Lakes), and locally in Europe (mainly around the Baltic Sea and Black Sea), Asia, Africa, and Australasia (Australia and New Zealand). North American birds migrate to southern coasts, the West Indies and northernmost South America. European and Asian birds spend the non-breeding season in the Old World tropics. African and Australasian birds are resident or disperse over short distances.
In 2016, a nest of the Caspian tern was found in the Cape Krusenstern National Monument in northwestern Alaska, 1,000 miles further north than any previous sighting. This development was part of a general trend in Alaska of species moving to the north, a tendency ascribed to global warming.
The global population is about 50,000 pairs; numbers in most regions are stable, but the Baltic Sea population (1400–1475 pairs in the early 1990s) is declining and of conservation concern.
The Caspian tern is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.
They feed mainly on fish, which they dive for, hovering high over the water and then plunging. They also occasionally eat large insects, the young and eggs of other birds and rodents. They may fly up to 60 km (37 mi) from the breeding colony to catch fish; they often fish on freshwater lakes as well as at sea.
Breeding is in spring and summer, with one to three pale blue green eggs, with heavy brown spotting, being laid. They nest either together in colonies, or singly in mixed colonies of other tern and gull species. The nest is on the ground among gravel and sand, or sometimes on vegetation; incubation lasts for 26–28 days. The chicks are variable in plumage pattern, from pale creamy to darker grey-brown; this variation assists adults in recognizing their own chicks when returning to the colony from feeding trips. Fledging occurs after 35–45 days.
Wikipedia
My dear friends in Caspian brought their monstrous sound to biggest stage I've had the privilege to watch them play.
I hope I did them justice in whatever small way I could.
Breakwater Herring Gull Ring-billed Gull for size comparison to Caspian Tern. Waterfront Port Stanley, Ontario
I had the opportunity to go out and do a bit of birdwatching on Weds (Its not all play I had been working in the garden in the morning). There are two areas I regularly visit and both were very productive. I was fortunate to encounter Black, White-winged, Whiskered and obviously a Caspian Tern throughout the day. The Black Tern is classified as uncommon here in SK all the others are rare visitors. I have been very lucky with Caspian Tern already, observing this species on a number of occasions since moving here. I was really pleased that I managed to get some reasonable photo's. I have adjusted these images a little on the computer and all are well cropped. It was a great day out :)
Caspian Dessert
A special occasion dining experience can be greatly enhanced by our personalized desserts.
Onshore Process Facility at Sangachal Terminal of the ACG project currently under installation within the Azerbaijan sector of the Caspian Sea.
I'm not sure if he had an in-flight itch or a shiver, but he shook himself for a split second. Lifer entwater breakwall and lighthouse, Michigan
July 9, 2022 - Caspian Tern Fishing at San Joaquin Wildlife Sanctuary. Photo Shoot with Leticia Hernandez, Esther Mukai, and Ayla.
Caspian Dessert
A special occasion dining experience can be greatly enhanced by our personalized desserts.
My dear friends in Caspian brought their monstrous sound to biggest stage I've had the privilege to watch them play.
I hope I did them justice in whatever small way I could.
Caspian Terns on Bethells Beach, NZ.
Large: View On Black
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©Fantommst
學名: Sterna caspia
英名: Caspian Tern
Family : Laridae (鷗科). Length: 51 cm.
燕鷗中最大的一種，喙粗大，飛行緩慢，叫聲低沉。掠過水面或俯衝潛水捕食魚蝦。棲息在海岸、島嶼和大湖泊中，營群巢，有時也單獨配對繁殖。巢：用腳扒並用身體壓成的淺坑，有的鋪稀疏的植物。
Caspian Tern is the world's largest tern with a length of 48–56 cm, a wingspan of 127–140 cm. Adult birds have black legs, and a long thick red-orange bill with a small black tip. They have a white head with a black cap and white neck, belly and tail. The upper wings and back are pale grey; the underwings are pale with dark primary feathers. In flight, the tail is less forked than other terns and wing tips black on the underside. In winter, the black cap is still present (unlike many other terns), but with some white streaking on the forehead. The call is a loud heron-like croak. Their breeding habitat is large lakes and ocean coasts in North America (including the Great Lakes), and locally in Europe (mainly around the Baltic Sea and Black Sea), Asia, Africa, and Australasia (Australia and New Zealand). They feed mainly on fish, which they dive for, hovering high over the water and then plunging. They also occasionally eat large insects, the young and eggs of other birds and rodents. They may fly up to 60 km from the breeding colony to catch fish.