Guianan Toucanet
Selenidera piperivora
Small toucan of rainforest canopy that is most often seen at fruiting trees at forest edge. Smaller than an aracari and tends not to occur in large groups. Sexes dissimilar, unlike other toucans in range; from below, note mostly black (male) or dark gray (female) plumage and colorful facial pattern. Reaches from a perch to pluck fruit similar to other toucans. Calls include croaking and wailing sounds which may not initially be recognized as coming from a bird.
识别特征
The Guianan toucanet is 33 to 35 cm (13 to 14 in) long. Males weigh 129 to 159 g (4.6 to 5.6 oz) and females 132 to 165 g (4.7 to 5.8 oz). Males and females have the same bill pattern but the female's bill is shorter. The bill has a yellowish line at its base. Both the maxilla and mandible are mostly black with red bases; the red extends further on the mandible. Both sexes have bare blue skin around the eye and a tuft of yellow feathers behind the blue. Males are black on the crown, nape, throat, breast and belly. They have a gold "collar" on their upper back; the rest of their upperparts are green. Their tail is green with chestnut tips to the feathers. Their undertail coverts are red. Adult females have a black cap and chestnut nape and upper back with only a hint of yellow collar. Their underparts are gray to green-gray with a green-yellow belly. Immatures are similar to adults but duller overall and with their plumage and bill patterns less distinct.
分类信息
The Guianan toucanet was originally described as Ramphastos piperivorus It was later named Selenidera culik but following early 21st century scholarship achieved its current (2022) binomial Selenidera piperivora.<p>The Guianan toucanet is monotypic.
- 学名
- Selenidera piperivora
- 命名信息
- (Linnaeus, 1758)
- 目
- Piciformes
- 科
- Ramphastidae
- 属
- Selenidera
分布与栖息地
The Guianan toucanet is found from extreme southeastern Venezuela east through the Guianas into northern Brazil and south to the Amazon River between the Rio Negro and the Amazon's mouth in the state of Amapá. It inhabits moist forest including gallery forest in savannas and favors primary forest over selectively logged areas. In elevation it usually occurs up to 600 m (2,000 ft) but is found as high as 900 m (3,000 ft) in Venezuela and Suriname.
- 迁徙
- Resident species
行为
The Guianan toucanet is believed to be a year-round resident throughout its range.<p>The Guianan toucanet's diet is mostly fruit, and it also takes insects. There is some evidence of coevolution with the Oenocarpus bacaba palm. It usually forages in pairs or small groups, and usually from the forest's mid level to the sub-canopy.<p>The Guianan toucanet breeds between March and May in Venezuela and the Guianas and from April to July in Brazil. Males courtship-feed females. It nests in woodpecker holes, sometimes evicting the maker. The clutch size is two or three eggs. The incubation time in captivity is about 16 days but is unknown in the wild; the time to fledging is not known.<p>The Guianan toucanet has a wide variety of vocalizations but uses them infrequently. Its song is a "slow series of guttural, frog-like 'arrouk' notes". Its basic call is a "rattle, 'trrrr-trrrr-trrrr...', joined with rising squawk, rooster-like at times, 'kaaaaaaiiiiii'". It also makes "various soft rattles and other calls, some aggressive, others used in courtship feeding and at [the] nest."
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Ringed Warbling Finch
Microspingus torquatus
Striking tanager of open woodland, consisting of two relatively distinctive subspecies. Distinguished from other warbling-finches in range by its black breast band. Nominate torquatus is a resident of the southern Bolivian Andes, especially open scrub and cactus forest of the dry valleys. Migratory pectoralis shows a thicker breast band and darker undertail coverts, and breeds in the Pampas, Monte, and northern Chaco dry forests in north central Argentina, dispersing north to lowlands of W Paraguay and SE Bolivia.
Bolivian Blackbird
Oreopsar bolivianus
Large, brown-winged blackbird of dry valleys in the high Andes of central and northern Bolivia. Prefers sparsely vegetated areas, such as Polylepis woodland, agricultural areas, towns, cactus forest, and scrublands. Brown wings are distinctive, but note that second-year blackbirds of other species (Chopi Blackbird, Shiny Cowbird) can show contrastingly brown retained juvenile wing feathers. Generally forages singly or in small groups, and sings from exposed perches. Song a simple, repeated two-part “pe-chew” given 3-8 times.
Jamaican Pewee
Contopus pallidus
A small, plain woodland species often found flycatching from exposed perches at middle levels in the forest; often flicks tail once upon landing. Note that this species has relatively inconspicuous wingbars and no eyering. The similar Eastern Wood-Pewee has distinctly longer primaries (assessed by looking at how far the primaries extend beyond tertials), whitish wingbars, and rarely flicks its tail upon landing. The Greater Antillean Elaenia has bold white wingbars and an entirely dark bill unlike the Jamaican Pewee. Vocalizations include plaintive “wee-wee,” with the second note louder and both notes upslurred, a similarly plaintive ‘uh-weee-oo” with the middle portion upslurred, and a slightly rough, whistled “weeah.”
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