Lapland Longspur
Calcarius lapponicus
Sparrowlike ground-dweller; crouches low to the ground and walks with pattering footsteps. Breeding male is gorgeous and unmistakable: yellow bill, black face, broad white eyebrow, and bright rufous nape unlike any other bird. Females and nonbreeding birds are much more subtle. Habitat and habits provide good clues: often in flocks in winter, sometimes mixed with Horned Larks or Snow Buntings, on barren landscapes such as beaches or dirt fields. To separate from other longspurs, look for combination of face pattern, rufous nape, and rufous wing panel with white tips. Breeds on Arctic tundra, where males sing a tinkling warble. Can also be heard giving "teew" notes and rattle calls like Snow Buntings and other longspurs.
识别特征
The Lapland longspur is a robust bird, with a thick yellow seed-eater's bill. The summer male has a black head and throat, white eyestripe, chestnut nape, white underparts, and a heavily streaked black-grey back. Other plumages have a plainer orange-brown head, a browner back and chestnut nape and wing panels.<p>Measurements:
分类信息
- 学名
- Calcarius lapponicus
- 命名信息
- (Linnaeus, 1758)
- 目
- Passeriformes
- 科
- Calcariidae
- 属
- Calcarius
分布与栖息地
It breeds across Arctic Europe and the Palearctic and in Canada and the northernmost United States. It is migratory, wintering in the Russian steppes, the southern United States, Northern Scandinavian arctic areas and down to coastal Southern Sweden, Denmark and Great Britain. This is the only Asian species of the longspur buntings, and while it probably did not evolve there, it has been present in Eastern Europe for at least about 30,000 years.
- 繁殖区
- NA, PAL : n
- 非繁殖区
- c PAL, s USA
- 迁徙
- Complete migrants
行为
The most common flight call is a hard "prrrrt" usually preceded by a more nasal "teeww". When breeding, it also makes a softer "duyyeee" followed by a pause and a "triiiuuu"; both sounds alternate.<p>It breeds in wet areas with birch or willow, and or bare mountains, and winters on cultivated land or coasts. The bird is often seen close to the tree line, and likes to feed in mixed-species flocks in winter. Its natural food consists of insects when feeding young, and otherwise seeds. The nest is on the ground. 2–4 eggs are laid.<p>The food habits of the Lapland longspur are quite simple: mostly seeds in winter and arthropods in the summer, when they are in activity.<p>During the winter, the longspur feeds on seeds. They pick them on the ground, rarely feeding directly on plants. They will forage around the same area for a period varying between a few minutes and an hour, then fly away looking for a new foraging area. Their seed diet is composed mainly of seeds from grass, foxtail, cultivated millet, crabgrass and wheat. During the breeding season, the birds migrate to the north, where their diet switches to arthropods. Nestlings are only fed arthropods, which also constitute the diet of the parents at that time of the year (June to July). The birds often catch insects in mid-air, but do forage through vegetation when climatic conditions prevent the insects from flying. Longspurs can consume between 3000 and 10,000 prey items (insects or seeds) per day, depending on their energy needs ; they may need to increase this number by 3000 when feeding the young. Dipteran larvae and adults form the major part of their insectivorous diet.
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
Principe Seedeater
Crithagra rufobrunnea
An incredibly dowdy small seedeater with a pink-horn bill and a pale throat. On São Tomé its color is gray-brown and on Príncipe more buffy-cinnamon. On São Tomé it is a common resident in most habitats from primary forest to suburban gardens up to 1500 meters of elevation; on Príncipe it is uncommon and more restricted to forest. Song is variable, but mostly a strident, rapidly delivered series of high-pitched notes “tseet-teet-teet-teet-tseeu-tseeu-tseeu” or similar; call is a slurred “tshweet.” The much larger Sao Tome Grosbeak is chestnut in color and rare in remote forest on São Tomé; Yellow-fronted Canary is much brighter.
Red Shoveler
Spatula platalea
Distinctive dabbling duck: combination of very large, slightly shovel-shaped black bill and and pale blue forewing patches (brighter on male) identify all plumages. Male has a pale gray head with pale yellow eyes and a “red” body with black spots. Female is mottled brown overall, but note white sides to pointed tail, big black bill. Fairly common in wetlands and at lakes, river mouths, and sewage lagoons. Unlike many dabbling ducks, often rather quiet.
Greater Yellow-headed Vulture
Cathartes melambrotus
Widespread and common vulture in lowland rainforest. Head may not appear yellow unless seen at close range. Best identified by steady flight with wings held at a slight dihedral. Similar to Turkey Vulture, but has broader wings which it holds flatter and does not teeter from side to side as often. Occurs in rainforest, cities, and agricultural areas.
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