Pied Imperial-Pigeon
Ducula bicolor
Robust, gregarious, and black-trimmed large white pigeon. Inhabits coastal forests on small offshore islands, only making occasional forays to mainland areas to forage and to roost. Often perches high on the bare branches of trees or on power/telephone lines; often found in flocks of ten or more. Song is very low in pitch and includes “woo-oo-woooo,” with the last syllable drawn out; loud at first and then trailing off. Compare with Silver-tipped and Torresian Imperial-Pigeons where overlap exists; no similar species in introduced range in the Caribbean.
分类信息
Its taxonomy is confusing and remains unsettled. It has sometimes included the Torresian, yellowish and silver-tipped imperial pigeons as subspecies. The widespread nominate subspecies of the pied imperial pigeon differs from all these by its plain white thighs and undertail coverts (though often with a dark spot at the very tip), and its narrowly dark-tipped bluish bill. For comparison, the other species' have black-spotted undertail coverts and thighs (spotting mainly near thighs in silver-tipped imperial pigeon), the bill of the Torresian imperial pigeon is greenish-yellow, and the bills of the yellowish and silver-tipped imperial pigeons are bluish at the base and yellowish at the tip. Furthermore, the yellowish imperial pigeon has a distinctive yellowish tinge to its plumage (some pied imperial pigeons may also appear yellowish, but infrequently to the same extent), and the silver-tipped imperial pigeon has silvery-grey remiges. However, the subspecies D. b. melanura of the Moluccas, which usually is considered a subspecies of the pied imperial pigeon, resembles the Torresian imperial pigeon in bill, thighs and undertail coverts, but has a significantly broader black tail-tip. Consequently, some have suggested it should be placed under the Torresian imperial pigeon, while others have suggested it should be considered an entirely separate species, D. melanura (for which the name black imperial pigeon has been used – an unfortunate choice, as only the tail has significantly more black than the other members of this group, and the name black imperial pigeon usually has been used for D. melanochroa). Yet others have considered melanura to be invalid, instead believing it only is a morph of D. b. bicolor, as both types can be found on some islands.
- 学名
- Ducula bicolor
- 命名信息
- (Scopoli, 1786)
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Ducula
分布与栖息地
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Golden Bush-Robin
Tarsiger chrysaeus
Shining and distinctively yellow robin of the montane forest understory. Male sports a blazing golden brow, yellow underparts, and a black face. Female is less contrastingly patterned, but still noticeably yellow, with browner underparts and a white eyering. Both sexes have a yellow panel on either side of the tail. Song is composed of rolling, buzzing notes; it is not as melodic as those of some other bush-robins.
Spot-backed Antshrike
Hypoedaleus guttatus
Chunky antshrike with a long tail and heavy bill with a hooked tip. Males are spotted black and white above (buffier in females) and brownish below with a barred tail. Found in the sub-canopy of vine tangles in humid forest, usually in pairs moving actively, but can be hard to see. The song is a long whistled trill that lasts about 5 seconds.
White-thighed Swallow
Atticora tibialis
Small dark brown swallow found in lowlands and foothills. Namesake white thighs are very difficult to see; instead focus on the overall darkness with little contrast. Rump is slightly paler but does not stand out nearly as much as on Southern Rough-winged Swallow. Small flocks are usually found near forest, though sometimes found feeding over adjacent open areas.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。