Gundlach's Hawk
Astur gundlachi
A secretive raptor of wooded habitats including mangrove swamps. Though this species sometime soars, its flight is usually powered by several rapid flaps followed by a brief glide. In flight, note the long rounded tail, short rounded wings, and a large head that protrudes well in front of the wings. Adults are barred orange below while immatures are streaked brown. The similar Sharp-shinned Hawk is somewhat smaller in body and head and has a shorter, squared-off tail. Migrant Sharp-Shinned Hawks from North America are scarce within this species’ range, and are best told by structure and size. Resident Sharp-shinned Hawks, which share this species’ range are conveniently barred gray below. Immature Sharp-shinned Hawks can also be distinguished from Gundlach’s by their narrow, but distinct white eyebrow. The Broad-winged Hawk is somewhat similar, but it is much shorter tailed and somewhat longer winged. The common call is an emphatic “eh-eh-eh-eh-eh…,” with the first couple notes quieter than rest.
识别特征
The hawk is a medium-sized forest raptor. It stands between 43–51 cm in height and has a stocky body shape. The adult hawk has a dark bluish-gray upper body and wings, with a black head. The under body of the bird is a lighter color. It also has a striped tail that is rounded in flight. Immature hawks are mostly brown on the top and paler on the bottom, but with dark streaking down the body. Compared to other raptors such as the bicolored hawk, Gundlach's hawks are shorter and faster.
分类信息
- 学名
- Astur gundlachi
- 命名信息
- Lawrence, 1860
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Astur
分布与栖息地
Gundlach's hawk is found only in Cuba. At one point it was common to find them throughout the country, however, now they can only be found in five isolated areas. The bulk of the population exists primarily on the eastern half of the island, in the two larger population centers, with the other three smaller populations on the west side of the island. They are able to live in a variety of habitats up 800 metres (2,600 ft). These include humid, dry, and pine forests. It does not have highly specialized habitat preferences needing only forests to conceal its hunting approaches Its natural habitats are dry forests and lowland moist forests. The species was never a common sight, but its population was dispersed throughout Cuba.
- 迁徙
- Resident species
行为
Typically, Gundlach's hawk nests high up in trees in the forest, such as pines, at about an altitude of 19–25 meters. Nesting high allows for hawks to prey on other birds that nest at much lower altitudes. Also, the altitude helps protect against predators. This is not uncommon to the accipiter genera. Nests are commonly made of smaller twigs from the trees that are found in the habitat.<p>Gundlach's hawk feeds almost exclusively on birds. Because of the hawks large feet, it can feed on the Cuban Parrot, the Cuban Parakeet, and the Cuban Macaw (before it became extinct). Other birds in its diet include doves, pigeons, quail and chicken.<p>Gundlach's hawks has two main calls the kek and the "squeal" which is usually associated with species of its type, Accipiter. The vocalizations for these calls are different for the sexes with variations in pitch, tempo and length. The male call is softer, clearer, and shallower with a higher peak compared to the female who makes most of the calls and whose call is at a softer pitch.
保护状况
Gundlach's hawk has been classified as endangered since 1994, due to its small and fragmented population. The past five years however, has shown a stabilization in the hawk's population trends. Population totals in Cuba were estimated to be about 400, including 270 mature hawks. This may warrant Gundlach's hawks to be reclassified as vulnerable. Perhaps the stabilization of the population can be attributed to conservation efforts that increase awareness of the hawk and its struggles. These conservation efforts include the public campaigning of Gundlach's hawk, the education of humans on the hawk and its environmental needs. Additional surveys of Cuba to assess current population and trends of Gundlach's hawk are required to determine the condition of the hawk in regards to extinction.<p>Gundlach's hawk faces a loss of habitat due to deforestation and logging in Cuba. It not only relies on trees for nesting but also for concealment as they prey on other birds. In addition to the loss of habitat the hawk also faces persecution from farmers because of its liking for poultry.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Stierling's Wren-Warbler
Calamonastes stierlingi
Long-tailed brownish warbler. White below with clean dark barring. Found in broadleaf woodland: miombo, mopane, and Zambezi teak. Usually found in pairs or small groups. Often raises its tail in wren-like fashion. The song consists of three metallic notes, often repeated, reminiscent of a telephone ringtone. Similar to Barred Wren-Warbler, but found in different habitat, and the dark barring on the underparts contrasts more strongly with the white base color.
Tacarcuna Wood-Quail
Odontophorus dialeucos
This rare chickenlike bird has an exceptionally small range on the border between Panama and Colombia. Found on the ground in mature forest from around 1,000–1,400 m. Dark brown overall with a black head, a whitish face and eyebrow merging with a buffy nape, and a white band across upper chest. Lives in small groups, which can be difficult to see. Listen for the rollicking whistled song, typical of wood-quail.
Puerto Rican Woodpecker
Melanerpes portoricensis
A medium-sized woodpecker that frequently forms small flocks and can be found in most wooded habitats. No other species in its range sports its glossy dark blue back and rosy front. Drums softly, calls loudly, often belying its presence. Most commonly gives an emphatic “Pik!” which is often repeated, sometimes in a rapidly accelerating series.
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