- Biak Monarch

Biak Monarch Symposiachrus brehmii Scientific name definitions

Peter Clement
Version: 1.0 — Published March 4, 2020
Text last updated December 17, 2018

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Field Identification

17 cm. A boldly patterned, black and cream-white monarch. Has narrow yellowish-white line around rear of ear-coverts; rest of head down to breast, and upperparts to lower back, black or blackish-brown, rump and uppertail-coverts white or whitish-cream; upperwing almost equally divided black and whitish, lesser wing-coverts to bend of wing black, median and greater coverts yellowish-white, and flight-feathers black except for yellowish-white on innermost tertial; tail with black central feathers, whitish outers; underparts pale yellowish to creamy; iris dark; bill and legs grey. Differs from Carterornis chrysomela in all-black head and face (and tail), and creamy white (not gold) in wing. Sexes similar, but female may have some white on throat and breast. Juvenile undescribed.

Systematics History

Monotypic.

Subspecies

Monotypic.

Distribution

Islands of Biak and Supiori (Geelvink Bay), in NW New Guinea.

Habitat

Little known. Most records from pristine lowland forest, but found also in degraded and second-growth forest.

Movement

Resident.

Diet and Foraging

No information on diet. Actively hawks and pursues insects in flight in middle and lower canopy levels of forest trees.

Sounds and Vocal Behavior

Little known; has a grating call typical of several monarchs.

Breeding

No information.

ENDANGERED. Restricted-range species: present in Geelvink Islands EBA. Scarce historically; only four recent records, of up to three individuals. Large areas of forest habitat on Biak have been destroyed by logging and for subsistence farming, and surviving forest is under increasing pressure. Supiori comprises impenetrable forested mountains which appear to be safe from degradation, and in which the species may prove to be present and widespread.

Distribution of the Biak Monarch - Range Map
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  • Year-round
  • Migration
  • Breeding
  • Non-Breeding
Distribution of the Biak Monarch

Recommended Citation

Clement, P. (2020). Biak Monarch (Symposiachrus brehmii), 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.biamon1.01
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