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A photo of a Western Gerygone (Gerygone fusca)
Western Gerygone

Western Gerygone

Gerygone fusca

The Western Gerygone, Gerygone fusca, is a diminutive bird cloaked in brownish-grey, with underparts of a paler hue. Its tail is a canvas of striking patterns, featuring large white patches at the base, a bold blackish band, and white tips that are most conspicuous when the tail is fanned during its hovering flight.

Identification Tips

To identify this species, look for the large white patches at the base of the outer tail feathers, a diagnostic feature that sets it apart from other Australian gerygones. The bird's upperparts are uniformly brownish-grey, lacking prominent wing markings, while the underparts are whitish with varying degrees of grey on the throat and breast.

Habitat

The Western Gerygone thrives in a diverse array of wooded environments, from open eucalypt-dominated sclerophyll forests to the more arid mallee and mulga shrublands. It is often encountered along watercourses and is typically found below 850 meters in elevated regions.

Distribution

Endemic to Australia, the Western Gerygone is the most widespread species of its genus. It is divided into three subspecies: G. f. fusca in southwest Western Australia, G. f. exsul in eastern Australia, and G. f. mungi in central Australia. Nomadic individuals may occasionally venture beyond these confines.

Behaviour

This species is usually observed alone or in pairs, actively foraging in the mid to upper strata of trees and shrubs. It may also participate in mixed-species feeding flocks. During the breeding season, it is territorial, with males performing fluttering displays.

Song & Calls

The Western Gerygone's song is a series of clear, high-pitched whistles, each note consistent in pitch with a distinct change between them. The melody is meandering, and while not loud, it is persistent and distinctive. On Rottnest Island, a unique song variant has emerged, characterized by a strictly repeated melody.

Breeding

Breeding typically occurs from September to January. The nest is an elongated, pendant structure with a hooded entrance. Clutch size ranges from 2 to 4 eggs, with only the female incubating. Both parents feed the nestlings, and fledglings are dependent for up to 15 days post-fledging.

Similar Species

While similar in appearance to other Australian gerygones, the Western Gerygone can be distinguished by its tail pattern and does not usually share habitat with these species.

Diet and Feeding

An insectivore, the Western Gerygone employs various foraging techniques, including probing bark, gleaning from foliage, hovering, and aerial strikes from perches.

Conservation Status

The IUCN lists the Western Gerygone as Least Concern. Although there is a declining population trend, it remains common in much of its range, particularly in Southwest Australia. The species is not currently threatened with extinction, but habitat clearance and climate change pose potential future risks.

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Western Gerygones on Birda

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