- Green-backed Tailorbird
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Green-backed Tailorbird Orthotomus chloronotus Scientific name definitions

Josep del Hoyo, Nigel Collar, and Guy M. Kirwan
Version: 1.0 — Published March 4, 2020
Text last updated January 24, 2018

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Field Identification

13 cm; 6·2–15 g. Typical tailorbird with graduated tail, relatively long bill slightly decurved towards tip; distinctive within range. Adult has top of head down to lores and below eye level bright reddish chestnut; entire upperparts, including mantle, quite bright yellowish green; tail reddish brown, brighter greenish edging at base; malar region and chin whitish, rest of underparts somewhat darker than formerly conspecific O. castaneiceps; feathered portion of tibia rusty rufous; maxilla dark brown; mandible pale grey washed vinaceous; legs pale vinaceous grey; iris brown. Sexes similar. Juvenile presumed to have hood greenish, rather than rufous.

Systematics History

Until recently treated as conspecific with O. castaneiceps, but differs genetically (1) and by its green vs grey back (3); darker underparts (1); and heavy use of strong trills vs occasional use of weak trills in song (at least 4) (2); see also O. frontalis and O. derbianus. Monotypic.

Subspecies

Monotypic.

Distribution

N & C Luzon (S to Bataan and Quezon Provinces), in N Philippines.

Habitat

Lowland bamboo and mixed thickets, as well as second-growth hill forest; to c. 1060 m.

Movement

Resident.

Diet and Foraging

Food insects; no precise details available. Keeps very much to low undergrowth , hence more difficult to see than are some tailorbirds.

Sounds and Vocal Behavior

For differences from formerly conspecific O. castaneiceps, see Taxonomy. Song a loud, bubbly, rhythmic series of notes in two parts, which may be uttered continuously for a minute or more in varying sequences; first part is a rising “tuutt” and second part a monotone snappy rattle, “tuutt p-p-p-p-p”; calls not described.

Breeding

Reported at least Mar–May, for example egg ready to be laid late May and fledgling in late Apr. Nest usually placed towards tip of branch or drooping fern frond in typical tailorbird fashion, with one or more leaves sewn together to form pouch; sited 0·2–10 m above ground but mostly lower, sometimes virtually at ground level. Clutch 2–3 white eggs spotted pale reddish lilac and brown; no information available on incubation and nestling periods.

Not globally threatened (Least Concern). Restricted-range species: confined to part of the Luzon EBA. Relatively common at most forested sites within the species’ range. Greatly favoured by its tolerance of, or even preference for, secondary growth. Can be very difficult to observe, but reveals presence by persistent singing; reasonably inquisitive, and responds well to “pishing” and “squeaking” methods of attracting it.

Distribution of the Green-backed Tailorbird - Range Map
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  • Migration
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Distribution of the Green-backed Tailorbird

Recommended Citation

del Hoyo, J., N. Collar, and G. M. Kirwan (2020). Green-backed Tailorbird (Orthotomus chloronotus), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.gnbtai1.01
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