設為首頁收藏本站

A-Plus互動討論區

 找回密碼
 立即註冊

Login

免註冊即享有會員功能

搜索
熱搜: 活動 交友 discuz
查看: 10|回復: 0
打印 上一主題 下一主題

wholesale nfl jerseys wokufqyg

[複製鏈接]

1萬

主題

1萬

帖子

4萬

積分

論壇元老

Rank: 8Rank: 8

積分
45633
跳轉到指定樓層
樓主
發表於 2018-6-23 12:19:16 | 只看該作者 回帖獎勵 |倒序瀏覽 |閱讀模式
分享到: 更多
The barred forest falcon (Micrastur ruficollis) is a species of bird of prey in the Falconidae family which includes the falcons, caracaras, and their relatives. It occurs throughout most of tropical and subtropical Latin America, except the arid Pacific coast in South America, northern and western Mexico, and the Antilles.Adults of most subspecies are typically dark slate grey above; the tail tipped with white and having three to six narrow white bars. The throat is pale grey, shading to the darker slate of the crown. The rest of its under parts, including the under-wing coverts are white, finely and clearly barred with black or dark grey. The upper breast is a darker grey. The primary remiges are dark brownish-grey with off-white bars on the inner webs. One subspecies, zonothorax from the East Andean foothills, is polymorphic (at least in the northern part of its range), and also occurs in a brown morph, where most of the upperparts, head and chest are brown or rufous instead of grey. The nominate subspecies, which is found from south-eastern Brazil south to north-eastern Argentina and west to Paraguay, appears to only occur in the rufous-brown morphotype, as also suggested by its scientific name, ruficollis.The eyes are cream to light orange-brown; the bill black, becoming yellow at base of the lower mandible; the cere, lores, and orbit are yellow, and the legs are orange-yellow.Barred forest falcons mainly utilize mature upland forest.In Central America, the species is generally restricted to mature tropical forests. In South America, however, the barred forest falcon lives in other kinds of forests and woodland, even relatively arid. For example, in Amazonia it occurs most often in secondary forests, gallery forests, tidal swamp forests, semi-deciduous forests and forest edges.In Acre, Brazil, the barred forest falcon is reported to prefer disturbed forest types, both natural secondary and manmade, including bamboo and more open seasonally drier forest on rocky outcrops.But generally it is a bird that avoids habitat when human influence is too pronounced, and will require primary or mature secondary forest to persist in any location. It is not commonly seen, but based on voice,Wholesale NFL Jerseys, it appears to be uncommon to fairly common throughout a large part of its range. This combined with its large range has led to it being classified as a species of Least Concern by the IUCN.It is rare on the eastern slope of the Colombian Cordillera Oriental, where it was recorded in primary forest and old secondary forest, in a narrow altitude band between 3,300 and 4,900 ft (1,000-1,500 m) ASL, and first encountered in the Serranía de las Quinchas only in 2000/2001. Second-growth forest in these mountains is dominated by trees like Melastomaceae (e.g. Miconia and Tibouchina) and trees are generally overgrown with epiphytes and hemiepiphytes like Coussapoa (Urticaceae).This species feed primarily upon small birds, mammals (mainly rodents and marsupials such as the Brazilian slender opossum, (Marmosops paulensis) and squamates. Like Accipiter hawks, they often hunt prey by sitting quietly on tree branches and waiting for their victims to appear. When the latter arrive, the forest falcons quickly ambush them, attempting to catch them with a brief, flying pursuit. However, forest falcons also use other techniques to hunt prey, such as chasing prey on foot, following army ant swarms, and acoustical luring of birds, by means of a “facial disc”. The species has also been recorded to snatch animals from traps or cages, for example during mark-recapture studies.Forest falcons do not build a nest, but lay their two or three white eggs in cavities in trees. Laying occurs mainly late in the dry season, with hatching taking place at the onset of the rainy season, a time of increasing prey abundance. Eggs hatch 33–35 days after being laid, and nestlings fledge 35–44 days after hatching. Radio-tagged fledglings dispersed from their parents’ territories within four to seven weeks after fledging, presumably achieving independence at that time. Nesting territories were occupied year after year; there is also high mate fidelity.(Source: Wikipedia – The Free Online Encyclopedia)
回復

使用道具 舉報

您需要登錄後才可以回帖 登錄 | 立即註冊

本版積分規則

重要聲明:本討論區是以即時上載留言的方式運作,A-Plus補習討論區對所有留言的真實性、完整性及立場等,不負任何法律責任。而一切留言之言論只代表留言者個人意見,並非本網站之立場,讀者及用戶不應信賴內容,並應自行判斷內容之真實性。於有關情形下,讀者及用戶應尋求專業意見(如涉及醫療、法律或投資等問題)。 由於本討論區受到「即時上載留言」運作方式所規限,故不能完全監察所有留言,若讀者及用戶發現有留言出現問題,請聯絡我們。A-Plus補習討論區有權刪除任何留言及拒絕任何人士上載留言(刪除前或不會作事先警告及通知),同時亦有不刪除留言的權利,如有任何爭議,管理員擁有最終的詮釋權。用戶切勿撰寫粗言穢語、誹謗、渲染色情暴力或人身攻擊的言論,敬請自律。本網站保留一切法律權利。

手機版|小黑屋|A-Plus互動討論區    

GMT+8, 2024-4-26 00:33 , Processed in 0.073106 second(s), 26 queries .

Powered by Discuz! X3

© 2001-2013 Comsenz Inc.

快速回復 返回頂部 返回列表