Red-footed Falcon

识别特征

It is a medium-small, long-winged species. The adult male is all blue-grey, except for his red undertail and legs; its underwings are uniformly grey. The female has a grey back and wings, orange head and underparts, and a white face with black eye stripe and moustaches.<p>Young birds are brown above and buff below with dark streaks, and a face pattern like the female. Red-footed falcons are 28–34 cm (11–13 in) in length with a wingspan of 65–75 cm (26–30 in). The average mass is 155 g (5.5 oz).

分类信息

The Amur falcon was formerly included herein as a subspecies but it is nowadays considered distinct. Nonetheless, it is the present species' closest relative; their relationship to other falcons is more enigmatic. They appear morphologically somewhat intermediate between kestrels and hobbies and DNA sequence data has been unable to further resolve this question, mainly due to lack of comprehensive sampling. They might be closer to the merlin than to most other living falcons, or more generally related to this species and American falcons such as the American kestrel and the aplomado falcon.<p>The genus name Falco is from Late Latin falx, falcis, a sickle, referencing the claws of the bird. The species name vespertinus is Latin for "of evening" from vesper, "evening".

学名

Falco vespertinus

命名信息

Linnaeus, 1766

目

Falconiformes

科

Falconidae

属

Falco

分布与栖息地

The main areas of European distribution are in southern Russia and Ukraine. The species occurs in large numbers in Hungary, Romania and Serbia. Smaller populations exist in Italy, Bulgaria and Moldova, in Austria, Slovakia and in Belarus. The red-footed falcon also breeds irregularly in the Czech Republic and in the Baltic States, occasionally also in Germany. In Asia, the breeding occurrences run in a relatively narrow band somewhat south of the taiga eastwards to the upper Lena, where they touch the range of the sister species Falco amurensis east of the Baikal. The northern border lies between the 63° and 58° north latitude, the south border around 45° north latitude. It runs along the north slope of the Altai and then westward follows the transition of open pine forests into the treeless steppe areas of Central Asia. Further to the west, the breeding areas on the lower reaches of the Volga and on the north coast of the Caspian Sea reach Europe. The southernmost occurrences are in the steppe areas north of the Caucasus and in South Georgia. Some isolated breeding areas are located in northern Turkey. The red-footed falcon winters in southern and eastern Africa. The red-footed falcon tends to reside in typical steppe type habitats ranging from Eastern Europe to Lake Baikal in Central Asia. This is a diurnal bird of open country with some trees, often near water. They tend to migrate far south for the winter, including in areas of Africa. The red-footed falcon tends not to make their own nests, but tend to use abandoned nests made by other birds such as the hooded crow, rook, and magpie. The nests that are chosen tend to be higher than the majority of the other nests; the nests tend to be 13–20 m (43–66 ft) above the ground and within 3–4 m (9.8–13.1 ft) of the tree top. Most of these nests tend to be near the edge of woods, avoiding nesting on solitary trees. Breeding takes place in these abandoned nests; usually breeding occurs colonially in rookeries because these birds tend to stay together in groups. This is also important because fledging success tends to be higher when these birds are in colonies and are not solitary. The red-footed falcon relies on the nests built by rooks, and with a decline in population of rooks, the number of suitable rookeries for colonial nesting has also decreased, leading humans to ideas of conservation.

繁殖区

PAL : c Europe to c Asia

非繁殖区

s AF

迁徙

Complete migrants

保护状况

The global population of red-footed falcon is estimated to be between 300,000-800,000 individuals, with 26,000 to 39,000 pairs in Europe. Most of the population breeds in the steppe grasslands of Russia and central Asia, although a significant amount also breeds in the Ukraine, Romania and Hungary. In 2005, the population in Hungary was estimated to be between 700 and 800, showing a steady decline. Red-footed falcons can be considered as a classic umbrella species because they affect other species living in the community. They play a popular role in the Natura 2000 designation process. Therefore, locating their breeding sites or creating breeding sites by providing artificial colonies has additional conservation and socio-economic benefits for both wildlife and the local human population.<p>A conservation program, which was funded by the EU's LIFE Nature financial instrument, was initiated on January 1, 2006 with the goal of increasing and maintaining the breeding population of the species in Hungary and western Romania. This conservation project developed a method to create more nesting sites by creating artificial nest box colonies. It's pretty common for the birds to be preyed upon by martens or other mammalian predators during incubation or during the nestling state, even in the artificial colonies. Some extreme cases show that the predators may threaten the existence of every clutch in the colony. They are using many methods to repel or trap potential predators in order to avoid predation. Some of those methods are listed in this section. There are many known threatening factors and the program takes active conservation measures against them. Some of these factors include being electrocuted by electric pylons so the program locates and insulates the exposed cables. Roadside trees are a common nesting site for falcons because they are also home to corvids. Previously, only safety aspects were considered in the management of these nesting facilities. Therefore, the project will submit a conservation based management plan to the correct authorities. One of the reasons of red-footed falcon decline is the collapse of the rook population due to drastic pest control measures. Based on previous experience and information from stakeholders, a draft "corvus management plan" will be prepared to handle the conflict situations caused by rooks.<p>Future conservation efforts proposed include continuing to conduct regular surveys throughout the area. Figuring out additional ways to help the species is crucial. Red-footed falcons are known to use artificial colonies, therefore, they can be a useful mid-term conservation tool to prevent their population from fragmenting. Also, there may be ways to help out the species by changing farming and land-use practices in Central Europe. Surveys in Bulgaria indicated that there is a decline in available breeding sites for the birds.

种群趋势

declining