Brown Tinamou
Crypturellus obsoletus
A rusty-colored tinamou with a grayish head and darker brown back. The vent is barred, but can be hard to see. Frequents humid forest (including second growth forests) with a dense understory, where it is shy and hard to see. The song is a long series of loud ascending whistles; the pauses between them can be long or short.
识别特征
The brown tinamou is approximately 25 to 30 cm (9.8–11.8 in) in length and it weighs about 350 to 550 g (12–19 oz). Depending on the subspecies involved, the upperparts vary from dark sooty-brown to bright chestnut and the underparts, which usually are paler than the upperparts, vary from chestnut to light ochraceous. The subspecies griseiventris is unique in having pale buff-grey underparts. All subspecies can be separated from the superficially similar little tinamou by the greyish (rather than whitish) throat. Females are typically larger and more rufescent than the males.
分类信息
All tinamous are usually treated in a single family (Tinamidae) and, contrary to traditional classifications, they are embedded within the group known as ratites, most closely related to the extinct moa of New Zealand. However, unlike ratites (ostriches, rheas, moa, kiwis, emus, cassowaries & elephantbirds), tinamous are capable of flight, although in general, they are not strong fliers. Different ratite lineages evolved separately from ancient flying birds, and tinamous are thought to most closely resemble these ancestral ratites.<p>Its distribution is highly disjunct and the subspecies, which quite probably represent more than one species, are distributed as follows:<p>Additionally, there are records from north Mato Grosso in Brazil, but it remains unclear which subspecies is involved. Most subspecies occur in highlands, but hypochraceus, griseiventris, and the southern populations of the nominate taxon occur in lowlands. It is uncommon to rare in most of its range, but commoner in southeastern Brazil, where it is the most frequently encountered member of its genus.
- 学名
- Crypturellus obsoletus
- 命名信息
- (Temminck, 1815)
- 目
- Tinamiformes
- 科
- Tinamidae
- 属
- Crypturellus
分布与栖息地
The brown tinamou is located in northern Venezuela, Colombia, Ecuador, Peru, northern and southern Brazil, extreme northeastern Argentina, eastern Bolivia, and eastern Paraguay. They may also be in Uruguay.<p>They live in tropical and sub-tropical moist lowland and montane forests, preferring elevations between 1,300 to 2,900 m (4,300–9,500 ft).
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Southern Martin
Progne elegans
Large swallow with pointed wings and slightly forked tail. Males are deep iridescent purple; females are also entirely dark, but are brownish below, with faint scaling. Migrates within South America; at some times of year, occurs with other very similar martin species, making identification difficult. Females lack the light belly of similar Purple and Gray-breasted Martins; males essentially indistinguishable from Purple Martin.
Sooty Thicket-Fantail
Rhipidura threnothorax
A medium-sized, long-tailed bird of lowland forest thickets, often near streams. All over sooty-gray plumage, with a short white eye-brow, white throat and a black chest with white dots. Likes to stay in cover, where it often twitches and fans its tail. Similar to Black and White-bellied Thicket-Fantails but Sooty has a black belly, and lacks the white wing bars and white tips to the tail. More often heard than seen. Most commonly given call is three explosive, downslurred notes “tyu-tyu-tyu!”.
Buff-faced Scrubwren
Aethomyias perspicillatus
A very small, drab bird of montane forest understory. Pale brown underparts, dark brown upperparts, Gray from the crown to upper back widening to a half-collar. Distinct buff face forming a disk around the eye. Found in active groups or mixed flocks, where it gleans leaves for insects. Similar to Large Scrubwren but Buff-faced is often found higher in the trees, is smaller with a buff eye-ring and gray crown. Song, an up-and-down, whistled “poo-pii-poo-pii-poo-pii!” and call, a nasal “rek!”.
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