|
The chestnut-bellied hummingbird (''Amazilia castaneiventris'') is a species of hummingbird in the Trochilidae family. It is found only in Colombia. Its natural habitats are subtropical or tropical moist montane forests and subtropical or tropical high-altitude shrubland. It is threatened by habitat loss. ==Distribution== The chestnut-bellied hummingbird distribution appears to be restricted to the dryer parts of the Magdalena Valley, Colombia, with a core known range in the Chicamocha, Suarez and Chucurí valleys. Even though there are now sites where it is known to be found, it is unpredictable in occurrence because of the unknown seasonal fluctuations. It spends the core of its range in dry valleys. Recent records have found it in more humid areas such as Río Chucurí near San Vicente de Chucurí and La Paz. Otherwise it has been found in Tipacoque, and a sighting in 2006 at Soatá and has been recorded in five municipalities including a rediscovered population in the environs of Soatá. The sightings seem to be around the range of 850m to 2200m above sea level because they like to habituate in places which are usually dry, but due to its current relocating it can now also be found in humid environments as well. It seems to be a nomadic species as certain suitable habitats have gone unrecorded for periods whilst it seems to be resident in others. The increased sightings of the bird has been due to the increased efforts by observers and the link that might have been made between the flowering events and their reliance on this. The population is estimated at 3,780 individuals, by extrapolating its known territory size by the area of suitable habitats. However, since many suitable habitats aren't occupied by these and they are not evenly distributed, this may represent an overestimate.〔Encyclopedia of Life (''Amazilia castaneiventris'': details ).〕〔Chestnut-bellied Hummingbird." N.p., n.d. Web. 25 Oct. 2012. (Chestnut-bellied Hummingbird / Amazilia castaneiventris ).〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chestnut-bellied hummingbird」の詳細全文を読む スポンサード リンク
|