Gray-green Fruit-Dove
Ptilinopus purpuratus
An unmistakable dove with a bright silver head, neck, and chest, dark green wings, a light green belly, and a yellowish tint to the forehead. Bill is bright banana yellow. Unique within its range. Call is a typical dove-like cooing, starting with “wooo wooo” followed by sounds likened to a taunting laughter.
识别特征
The grey-green fruit dove is around 20 cm (7.9 in) in overall length and weighs 95 g (3.4 oz). It is small and plump and has a short tail. The upperparts are olive green, the crown and forehead are light purple. The neck and chest are gray and the belly is pale yellow. There is a light gray band around the tail. The beak is yellowish or greenish yellow with an orange cere. The sexes are similar but the female has a greenish tinge to the grey of the head and neck. The juvenile lacks the light purple crown and is duller.
分类信息
The grey-green fruit dove was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with all the other doves and pigeons in the genus Columba and coined the binomial name Columba purpurata. Gmelin's description was based on the "purple-crowned pigeon" from Otaheite (now Tahiti) that had been described in 1783 by English ornithologist John Latham in his A General Synopsis of Birds. The grey-green fruit dove is now placed with nearly 60 other fruit doves in the genus Ptilinopus that was introduced in 1825 by the English naturalist William John Swainson. The genus name combines the Ancient Greek ptilon meaning "feather" with pous meaning "foot". The specific epithet purpuratus is from Latin and means "clad in purple".<p>Two subspecies are recognised:<p>The Raiatea fruit-dove (P. chrysogaster) of Raiatea was formerly considered conspecific, but was split as a distinct species by the IOC in 2021.
- 学名
- Ptilinopus purpuratus
- 命名信息
- (Gmelin, JF, 1789)
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Ptilinopus
分布与栖息地
The grey-green fruit dove is endemic to the French Polynesian islands of Tahiti and Mo'orea. There is an estimated population of 2,500 to 10,000 mature individual birds on the two islands, of which 5,000 - 6,000 live on Mo'orea, at an estimated density of 2-3 birds per hectare.
- 迁徙
- Resident species
行为
Feeding is almost entire aboreal. This contrasts with the closely related atoll fruit dove (Ptilinopus coralensis). The diet consists various plants including chili peppers (Capsicum), guava (Psidium) and figs (Ficus).<p>The nest is a flimsy platform of sticks placed in a tree. A single white egg is laid.
保护状况
- 种群趋势
- declining
照片
分布
其他鸟类
Gray Seedeater
Sporophila intermedia
Small finchlike bird. Male plain gray with white belly, small white patch at base of primaries, and thick yellow or pinkish-colored bill with curved culmen. No wingbars. Female fairly rich medium brown, extremely similar to other female seedeaters, especially Slate-colored. Note dark blackish bill, but even that is not a foolproof field mark. Generally quite common in open grasslands, edges of second growth, and shrubbery. Usually in small flocks, sometimes mixing with other seedeater species.
Guatemalan Flicker
Colaptes mexicanoides
Large, brownish woodpecker with black barring on the back and black spots on the belly. Easily recognized in flight by its bright white rump. Also note large black crescent-shaped mark on breast and brownish crown. Wings and tail flash red in flight. Typically singly or in pairs in a variety of wooded or semi-open habitats, but less often in tall, dense forest. Sometimes seen feeding on the ground in open areas, foraging for ants and worms.
Galapagos Petrel
Pterodroma phaeopygia
Endangered seabird that nests only in Galápagos. Outside the breeding season, it disperses over the eastern Pacific and usually stays far from land. Note distinctive black-and-white pattern on underwing, mostly white underparts, and dark upperparts that extend down through its face to sides of neck; no other seabird found in and near Galápagos shares these features. When seen from above, it appears all dark except for some white around the base of the bill. Almost always encountered at sea, since it travels to and from its highland nesting sites only at night.
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