Slaty-tailed Trogon
Trogon massena
Large, red-bellied trogon of humid tropical lowlands. Favors rainforest interior, but also found at edges and around clearings, mainly perched quietly and in an upright position at middle to upper levels in larger trees. Lack of white band above the red belly and entirely dark gray undertail (or with a few fine white bars at the sides on immatures) separate Slaty-tailed from other red-bellied trogons. On males also note the stout orange bill and orange eyering. Digs its nest in arboreal termite nests.
识别特征
Trogons have distinctive male and female plumages, with soft, often colorful, feathers. The slaty-tailed trogon is 30 to 35.5 cm (12 to 14 in) long and weighs about 140 to 155 g (4.9 to 5.5 oz). The nominate male has an orange-red bill and a dull black face, chin, and upper throat with a red to orange ring around the eye. The upperparts are metallic green that tends to golden green on the back and bluish green on the crown and rump. The breast is metallic green and the belly and vent deep red. The folded wing has fine black and white vermiculation that looks gray at a distance. The upperside of the four central tail feathers are metallic green to bronzy green with black tips, the next pair mostly black, and the outermost pair entirely black. The undersides of the tail feathers are slate gray with black tips. The female replaces most of the male's green with gray that is paler on the upper breast than on the upperparts. The upperside of the tail is black. The female's maxilla is dusky gray.<p>The male T. m. hoffmanni's plumage is essentially the same as the nominate's but the upperside of the tail is more golden. T. m. australis is smaller than the nominate. Compared to the nominate, the male's uppertail is bluish green and the female's darker gray. The male's undertail is browner than the nominate's and there is more metallic green on the face and throat.
分类信息
Three subspecies of slaty-tailed trogon are recognized as of 2021: the nominate T. m. massena, T. m. hoffmanni, and T. m. australis. The last has sometimes been treated as a subspecies of black-tailed trogon (T. melanurus) or as a separate species.
- 学名
- Trogon massena
- 命名信息
- Gould, 1838
- 目
- Trogoniformes
- 科
- Trogonidae
- 属
- Trogon
分布与栖息地
The nominate subspecies of slaty-tailed trogon is found on the Caribbean slope from southern Mexico through Belize, Honduras, and Guatemala into Nicaragua. T. m. hoffmanni is found on the Caribbean and Pacific slopes of Costa Rica and Panama, and also in extreme northwestern Colombia. T. m. australis is found in western Colombia and far northwestern Ecuador. The species primarily inhabits the midstory to the canopy of tropical evergreen forest and mature secondary forest, and can also be found in gallery forest, coffee plantations, and mangroves. It is a bird of the lowlands, reaching only 600 m (2,000 ft) in Mexico and northern Central America. It is found locally as high as 1,200 m (3,900 ft) in Costa Rica, 1,400 m (4,600 ft) in Panama, and 1,100 m (3,600 ft) in Colombia.
- 迁徙
- Resident species
行为
The slaty-tailed trogon forages for fruits and insects by sallying or hover gleaning from a perch. It often follows white-faced capuchin monkeys (Cebus capucinus and C. imitator) to catch insects displaced by them.<p>The slaty-tailed trogon's breeding season varies geographically, but appears to span from February to July overall. Males and females display to each other by raising the tail and fluffing the uppertail covert feathers. It nests as high as 15 m (49 ft) in a cavity excavated in an occupied termite nest or decaying tree trunk. Both sexes excavate the nesting chamber. The typical clutch is two or three white or bluish-white eggs, and both sexes incubate them.<p>The slaty-tailed trogon's song is "a steady deliberate series of cow or cue notes"; another description is "a deep full-throated wuk, wuk, wuk …." Its calls include "a quiet clucking huh-huh-huh-huh" and a "chuckling chatter".
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Flutist Wren
Microcerculus ustulatus
Tiny, mouse-like bird of tepui forest understory. Entirely dark rufous-brown with a stubby tail. Found only in humid, mossy forest on tepui slopes, mostly above 1000 meters, where it is difficult to see, staying close to the ground as it crawls over roots, rocks, and large branches. Usually encountered alone and does not follow mixed-species flocks. Most easily detected by its extraordinary song: a variable series of short, pure whistles, rising and falling but usually ending with several notes on the same pitch; humanlike and easily imitated. May pop into view in response to imitation or playback, bobbing nervously before disappearing. Could be confused with Tepui Wren, but is darker brown overall and lacks buffy eyebrow.
Lesser Nighthawk
Chordeiles acutipennis
Long-winged nocturnal bird which catches insects in flight often around dawn and dusk. Found in shrubby open areas. Intricate brown, buffy, and gray patterning with white patches near wingtips. Very similar to Common Nighthawk, best distinguished by the position of white wing patch: closer to wingtip on Lesser, closer to base of wing on Common, but this difference can be very difficult to judge. Also typically paler than Common with more golden buffy tones. During the day, roosts on the ground or on a tree branch.
Montagu's Harrier
Circus pygargus
Lightly built hawk with rather narrow and somewhat tapered wings. Favors heathland, grassland, arable fields, marshes. Mainly seen in flight, quartering fairly low with wings raised in shallow V; flight rather buoyant. Male pale gray overall with black wingtips (can be confused with a gull); note narrow black bar on upperwing. Female told from Hen Harrier by narrower wings, more buoyant flight; juvenile bright rusty below. Some individuals are very dark overall. Pallid Harrier males lack the black wing bars and rusty traces on the underparts of their Montagu's counterparts, while Pallid females and juveniles average far paler in the face.
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