Gray-headed Spinetail
Cranioleuca semicinerea
Distinctive-looking species with a short crest and a long spiky tail. Pale gray head and underparts contrast strongly with rusty back, tail, and wings. Note the indistinct whitish eyebrow. Inhabits forest vegetation, where normally forages acrobatically in the canopy and sub-canopy. Sings high-pitched, thin descending notes finishing with a trill: “tseet-tseet-tseet-tseet-titititititit.”
Identification
The grey-headed spinetail is 14 to 16 cm (5.5 to 6.3 in) long and weighs 14 to 16 g (0.49 to 0.56 oz). The sexes have the same plumage, which in its range is unique. Adults have a faint whitish supercilium and a gray-brown line through the eye on an otherwise pale gray face. Their forehead is pale buffy gray and their crown and nape are slightly darker gray; the crown has a short crest. Their back, tail, and wings are rufous-brown. Their tail feathers are graduated and lack barbs at the end giving a spiny appearance. Their throat and belly are pale gray and their breast, flanks, and undertail coverts are darker gray. Their iris is amber to dark brown, their bill dusky pinkish with a dark tip, and their legs and feet olive to yellowish green or paler pink-brown.
Taxonomy
The grey-headed spinetail's taxonomy is unsettled. The International Ornithological Committee and BirdLife International's Handbook of the Birds of the World treat it as monotypic. The Clements taxonomy assigns it two subspecies, the nominate C. s. semicinerea (Reichenbach, 1853) and C. s. goyana (Pinto, 1936).<p>This article follows the monotypic model.
- Scientific name
- Cranioleuca semicinerea
- Authority
- (Reichenbach, 1853)
- Order
- Passeriformes
- Family
- Furnariidae
- Genus
- Cranioleuca
Range and habitat
The grey-headed spinetail is found in eastern Brazil from Ceará south to Goiás and slightly into Minas Gerais. It inhabits dryer deciduous and semi-deciduous forest and woodlands and the edges of more humid evergreen forest. In elevation it ranges between 500 and 850 m (1,600 and 2,800 ft).
- Migration
- Resident species
Behavior
The grey-headed spinetail is a year-round resident throughout its range.<p>The grey-headed spinetail feeds on arthropods. It typically forages in pairs, usually as part of a mixed-species feeding flock. It acrobatically gleans prey from bark and debris as it hitches along small branches high in the forest's subcanopy and canopy.<p>The grey-headed spinetail's nest is an oval ball of moss and rootlets with a side entrance, typically wrapped around a horizontal branch about 5 to 12 m (15 to 40 ft) above the ground. Both parents provision nestlings. Nothing else is known about the species' breeding biology.<p>The grey-headed spinetail's song is an "extr. high 'tsit-tsit-tsit-' then bouncing down as [a] rattle". Its call is a "high 'trwit' ".
Conservation
- Population trend
- declining
Photos
Distribution
Bird Calls
Other Birds
Black-hooded Thrush
Turdus olivater
Medium-sized thrush of montane forests. Looks large and bulky compared to other thrushes in range; note male’s distinctive black head contrasting with brownish-olive body and yellow bill and legs. Female is similarly patterned but much duller. Found in highland forest and second growth, generally above 800 meters, where it is often the most common thrush. Most reliably seen at fruiting trees, where many individuals may congregate; also often seen at middle levels of forest, where it may take conspicuous perches to assess an observer before flying off. Song is a halting series of phrases, many of them doublets, generally alternating between rich, low notes and high reedy ones; call note is a rich, liquid bark. Male is unlikely to be confused with other species; female could be confused with female Pale-eyed Thrush but is larger, has darker eyes with distinct eyering and a semblance of male’s hooded look.
Steppe Eagle
Aquila nipalensis
A large eagle with rich brown plumage, wide wings, and seven well-splayed “fingers” at the wingtip. Adults are entirely dark brown; juveniles and immatures at rest show a distinctive wide white band bordered with black on the wing. In flight, this transforms into a white traverse band on the underwing that forms the base of the primary and secondary feathers. Birds take about four years to attain adult plumage. Frequents open grasslands, deserts, scrub, wetlands, and mountains, and is a regular carcass feeder along with vultures.
Buller's Shearwater
Ardenna bulleri
Striking large shearwater with distinctive dark "M" pattern on upperwings. Also note crisp dark cap and clean white underwings and belly. Looks silvery-gray above when fresh, but worn birds can be more brownish. Graceful flight style. Usually easily separated from other shearwaters by wing pattern. Breeds on islands off New Zealand; ranges across the Pacific during nonbreeding season; uncommon off the west coast of the U.S. in fall. Rarely seen from land, prefers to stay offshore. Found singly or in flocks with other shearwaters.
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