Pacific Gull
Larus pacificus
Large dark-backed gull with enormous golden yellow bill with thick red tip (red on both upper and lower parts of beak), yellow legs, black tail tip. Juvenile is heavily marked grayish. Occurs mainly along the coast of southern Australia. Identified from Kelp Gull by larger size, thicker bill, and black tail tip.
识别特征
Pacific gulls are the only large gulls in their range, besides the occasional kelp gull. This species can range in length from 58 to 66 cm (23 to 26 in) and span 137 to 157 cm (54 to 62 in) across the wings. They typically weigh from 900 to 1,180 g (1.98 to 2.60 lb). This species is mostly white, with dark wings and back, and a very thick (when compared to other gull species), powerful, red-tipped yellow bill. They have salt glands that secrete salty water through the nostrils. Young birds are mottled-brown all over, and attain their adult plumage only gradually; by its fourth year, a young Pacific gull has usually become difficult to tell apart from an adult bird.<p>Of the two subspecies, the nominate eastern race prefers sheltered beaches, and the western race L. p. georgii is commonly found even on exposed shores. Both subspecies nest in pairs or loose colonies on offshore islands, making a cup of grasses and sticks in an exposed position, and laying two or three mottled brown eggs.
分类信息
The Pacific gull was first described by English ornithologist John Latham in 1801 from a Thomas Watling drawing, where the local name had been recorded as Troo-gad-dill. Its specific epithet refers to the Pacific Ocean.<p>Two subspecies are recognised: the nominate race L. p. pacificus from the south-east coast and Tasmania, and L. p. georgii from South Australia and Western Australia.
- 学名
- Larus pacificus
- 命名信息
- Latham, 1801
- 目
- Charadriiformes
- 科
- Laridae
- 属
- Larus
分布与栖息地
- 迁徙
- Resident species
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类

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Unusually small kestrel with a gray head, a rufous back, unmarked buff underparts, a barred tail, and a dark “moustache” mark on the face. Found on several of the granitic Seychelles Islands. Originally found in areas of rainforest with cliffs and other rocky areas; now found in secondary scrub, cultivated areas, plantations, and towns, as well as in remnant natural habitat. Unlike other kestrels, does not hover. Call is a high, repeated “krii.” Shares general falcon shape with migrant and vagrant falcons, including Eleanora’s and Sooty Falcons, but smaller, with shorter, less pointed wings.

Nubian Nightjar
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Northern Mockingbird
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Common and fairly widespread across much of North America and the Caribbean. Medium-sized songbird with a relatively long tail, small head, and short bill. Gray above and paler whitish below. Note white wingbars and large white patch at the base of the primaries. Found in a variety of open habitats with scattered bushes or trees, often close to human settlements. Well-known for its impressive mimicry; often includes a wide range of other birds, car alarms, slamming doors, and other mechanical noises in its song. Limited range overlap with Tropical Mockingbird at the Isthmus of Tehuantepec in Mexico; Northern is most easily identified by its large white wing patches.
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