發佈日期：2015年8月11日
The roseate tern (Sterna dougallii) is a seabird of the tern family Sternidae. This is a small-medium tern, 33–36 cm long with a 67–76 cm wingspan, which can be confused with the common tern, Arctic tern, and the larger, but similarly plumaged, Sandwich tern.
Roseate tern's thin sharp bill is black, with a red base which develops through the breeding season, and is more extensive in the tropical and southern hemisphere races. It is shorter-winged and has faster wing beats than common or Arctic tern. The upper wings are pale grey and its under parts white, and this tern looks very pale in flight, like a small Sandwich tern, although the outermost primary flight feathers darken during the summer. The adults have very long, flexible tail streamers and orange-red legs. In summer, the underparts of adults take on the pinkish tinge which gives this bird its name.
https://en.wikipedia.org/wiki/Roseate...
紅燕鷗（Sterna dougallii）是燕鷗科的一種海鳥,也名粉紅燕鷗。這種鳥有很多不同分布地區的族群，不同之處主要為喙的顏色及幼鳥的羽毛顏色。
紅燕鷗在北美洲及歐洲的大西洋海岸繁殖，並南下加勒比地區及西非越冬。
該物種的模式產地在蘇格蘭。
https://zh.wikipedia.org/wiki/%E7%B4%...
The greater crested tern[3] (Thalasseus bergii), also called crested tern or swift tern, is a seabird in the tern family that nests in dense colonies on coastlines and islands in the tropical and subtropical Old World. Its five subspecies breed in the area from South Africa around the Indian Ocean to the central Pacific and Australia, all populations dispersing widely from the breeding range after nesting. This large tern is closely related to the royal and lesser crested terns, but can be distinguished by its size and bill colour.
The greater crested tern has grey upperparts, white underparts, a yellow bill, and a shaggy black crest that recedes in winter. Its young have a distinctive appearance, with strongly patterned grey, brown and white plumage, and rely on their parents for food for several months after they have fledged. Like all members of the genus Thalasseus, the greater crested tern feeds by plunge diving for fish, usually in marine environments; the male offers fish to the female as part of the courtship ritual.
This is an adaptable species that has learned to follow fishing boats for jettisoned bycatch, and to use unusual nest sites such as the roofs of buildings and artificial islands in salt pans and sewage works. Its eggs and young are taken by gulls and ibises, and human activities such as fishing, shooting and egg harvesting have caused local population declines. There are no global conservation concerns for this bird, which has a stable total population of more than 500,000 individuals.
https://en.wikipedia.org/wiki/Greater...
鳳頭燕鷗（學名：Thalasseus bergii），具羽冠的燕鷗，為鷗科鳳頭燕鷗屬的鳥類。羽冠具灰色雜斑。捕食魚類為生。遍及印度洋沿海，以及波斯灣，馬祖、基隆、宜蘭亦有分布。
https://zh.wikipedia.org/wiki/%E5%A4%...
影音／Roseate tern vs. Greater crested tern 紅燕鷗 vs. 鳳頭燕鷗--mrdannyfu
- 2015-08-12
