Azure Gallinule
Porphyrio flavirostris
Small, pale chickenlike marsh bird with washed out gray-blue underparts that contrast with its olive brown back and crown. Note the thick yellow bill and frontal shield. Found in freshwater marshes with abundant floating vegetation where its appearances may be seasonal and erratic. Rarely seen swimming.
Identification
The azure gallinule is 23 to 26 cm (9.1 to 10 in) long. Males weigh 92 to 111 g (3.2 to 3.9 oz) and females 92 to 107 g (3.2 to 3.8 oz). It is the smallest member of its genus and has quite different plumage from the others. The sexes are alike. Adults have a pale greenish yellow bill and frontal shield and yellow legs and feet. They have a pale brownish olive crown, hindneck, and back. Their upperwing coverts are azure to greenish blue, their flight feathers gray-blue, and the uppertail coverts and tail brownish olive to black. Their face, sides of the neck, and breast are pale blue-gray and the rest of their underparts white. Immature birds have browner upperparts than adults with a buffy face, neck, and breast; their frontal shield is green and their legs and feet yellowish orange.
Taxonomy
The azure gallinule 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 the coots in the genus Fulica and coined the binomial name Fulica flavirostris. Gmelin based his description on "La Favorite de Cayenne" that had been described and illustrated in 1781 by the French polymath Georges-Louis Leclerc, Comte de Buffon. The azure gallinule is now placed in the genus Porphyrio that was introduced by the French zoologist Mathurin Jacques Brisson in 1760. The genus name Porphyrio is the Latin word for "swamphen" (from the Ancient Greek πορφυριος/porphurios meaning "purple-clad"). The specific epithet flavirostris combines the Latin flavus meaning "yellow" and -rostris meaning "billed". <p>The azure gallinule is monotypic: No subspecies are recognized.
- Scientific name
- Porphyrio flavirostris
- Authority
- (Gmelin, JF, 1789)
- Order
- Gruiformes
- Family
- Rallidae
- Genus
- Porphyrio
Range and habitat
The azure gallinule is found in Trinidad and Tobago; from Venezuela south through Colombia and Ecuador into northern Peru; from Venezuela east through the Guianas into Brazil; in Amazonian Brazil, Peru, Bolivia, Paraguay and far northern Argentina; and in eastern Brazil's states of Minas Gerais and Rio de Janeiro. It has also occurred as a vagrant in Uruguay. It primarily inhabits freshwater marshes with fairly deep water and much marsh grass and other vegetation. It also occurs in rice paddies, wet savanna, the margins of swampy streams and rivers, and permanent and seasonal ponds. Though it often shares habitat with the purple gallinule (P. martinica) it prefers areas with shorter vegetation and no bushes. In elevation it typically is found below 500 m (1,600 ft) but has been recorded as high as 2,600 m (8,500 ft) in the Colombian Andes.
- Migration
- Complete migrants
Behavior
The azure gallinule makes seasonal movements in most of its range; many movements appear to follow the local wet season. Most of the records in the far north are between April and August and that population moves south into southern Amazonia following that period. The species is present in the upper Amazon basin only between January and July. It appears to be resident in southern Colombia and Ecuador, though it does not breed in northern Colombia. It also is present in Peru only outside the breeding season.<p>The azure gallinule's diet has not been fully defined but is known to include grass seeds, several kinds of insects, and spiders. It forages both in cover and in the open on floating vegetation, and seldom swims. It climbs on grass stalks, bending them to reach the seeds.<p>The azure gallinule's breeding season varies geographically. For example, it nests between May and August in Suriname and in Ecuador probably between June and September. It is monogamous and is believed to be territorial in the breeding season. It conceals its nest of dead leaves and rushes in marsh vegetation. Both sexes incubate the clutch of four or five eggs but the incubation period is not known.<p>The azure gallinule is usually quiet but sometimes makes "a short trill".
Conservation
- Population trend
- unknown
Photos
Distribution
Bird Calls
Other Birds
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Larus smithsonianus
Common and widespread large gull found throughout North America. Adults have a fairly pale gray back, pale eye, and dull pinkish legs. Takes four years for immatures to progress from mostly brown to fully white and gray adult plumage; intermediate plumages are often mottled and messy. Usually shows a dull pinkish base to the bill by the first winter, and develops a pale eye by the second winter. Some immature birds can fade to almost white, especially in their first or second summer, but they always show darker wingtips. Occurs inland and along the coast, frequenting fishing boats, beaches, lakes, and landfills. Often forms large flocks with other gulls.
Field Sparrow
Spizella pusilla
Small, slender, blank-faced sparrow. Can be either gray or buffy overall, but always note small pink bill, plain face, and thin white eyering. Inhabits overgrown fields and other brushy areas in eastern North America. Often joins flocks of sparrows in winter. Can visit feeders, but less frequently than Chipping or American Tree sparrows. Song is a series of bell-like notes, accelerating like a dropped ping-pong ball.
Gabon Coucal
Centropus anselli
A large, reddish-bellied forest coucal of Central African forests, occasionally found in more open and disturbed habitats. Most often detected by its call, which is a long or short series of hollow loud hoots, the last few usually lower, sometimes given as a duet. Overlaps locally with Black-throated Coucal, which has a black throat and a cream-colored belly.
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