Ridgway's Hawk
Buteo ridgwayi
A scarce small hawk of forests and open woodlands. The adult is very distinctive with its gray hood and barred orange belly. Immatures are pale-buff below with brown streaking and are brown above. Immatures separated from immature Red-tailed Hawk by small size and, in flight, by the lack of dark patagial bars. Typically rather approachable. Feeds on a wide variety of prey including large insects, small birds, and bats. Common call is loud, shrill, repeated “wee-uh.”
识别特征
B. ridgwayi is a medium-sized, compact hawk, measuring 36–41 cm long. The adult has brown-grey upperparts and greyish barred underparts, with a reddish-brown wash, rufous-tinged thighs, and a black-and-white barred tail. The male is greyer than the female, and the legs and the base of bill are yellow.
分类信息
- 学名
- Buteo ridgwayi
- 命名信息
- (Cory, 1883)
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Buteo
分布与栖息地
Ridgway's hawk's original breeding range included all of the island of Hispaniola and some of the adjacent isles and keys, such as Gonâve Island, Île-à-Vache, Tortuga, Beata Island, and Alto Velo Island. However, it has since been extirpated from a large area of the Dominican Republic and almost all of Haiti, due to extensive deforestation and loss of habitat there. It was thought to be completely extirpated from all of Haiti; however, recent expeditions to the islands of Les Cayemites discovered a breeding population there. In the Dominican Republic, the only known surviving populations outside of reintroductions is in and around Los Haitises National Park, and a relict population in the Samaná Peninsula.
- 迁徙
- Resident species
保护状况
This bird is described as critically endangered, due to clearance of its forest habitat and persecution by local farmers, who claim that the species preys upon their domestic fowl. Conservationists have countered that poultry is nothing more than a minor element of their diet, and that the Ridgway's hawk has a highly varied prey base, with reptiles comprising up to 90% of its diet. Electrocution from power poles and nestling parasitism by Philornis pici flies are also reasons for population decline. Reintroductions in the Ecological Center of the Puntacana Resort and Club in La Altagracia Province have proven successful; 25 individuals were also released in Aniana Vargas National Park in Sánchez Ramírez Province, with more releases planned. It is proposed that a "Ridgway's Hawk Day" should become a national holiday in the Dominican Republic, in order for the species to become more publicly known and protected.
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
El Oro Parakeet
Pyrrhura orcesi
Rare and endangered parakeet endemic to foothill cloud forest in southwestern Ecuador. It is mostly green with red on forehead, shoulder, and undertail. Flight feathers are blue, which is usually only evident in flight. Also note the whitish eyering and rather long tail. Usually encountered in small flocks that fly from tree to tree, screeching as they go. Most of the known population is found in and around the Buenaventura Reserve, where the birds are successfully using artificial nest boxes.
Red-crested Bustard
Lophotis ruficrista
A medium-sized, black-bellied bustard with diagnostic white chevrons on a brown-and-black mottled back. The male has a brown-gray neck and slaty cap, and the female is plainer. The name is misleading, as the red crest is almost always hidden. It walks slowly and steadily in arid woodlands, where it is common but due to its camouflage often avoids detection. The song is a sequence of clicking “tic-tic” notes that are followed by a mournful piping “sweee-swee-sweee sweet” series that accelerates to a crescendo. The male indulges in an absurd display in which he flies nearly vertically into the sky and then folds his wings and somersaults down as if shot, only to unbelievably land on his feet. In flight the Red-crested Bustard’s all-black underwings differentiate it from Black-bellied Bustard, which has white windows in the underwing.
Eurasian Thick-knee
Burhinus oedicnemus
Large bizarre shorebird of open stony heathland and dry grassland. Active mainly at night and spends the day sitting inconspicuously; thus, overlooked easily. Distinctive appearance, with rather large size, streaky brown plumage, big yellow eyes, and thick yellow legs; black-and-white wing pattern shows in flight. Loud piping calls given mainly at night may suggest curlew or oystercatcher.
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