Family Reed-warblers (Acrocephalidae)

Extinct

Aldabra Brush-warbler (Nesillas aldabrana)


Taxonomy

French: Nésille d’Aldabra German: Aldabraspötter Spanish: Zarzalero de Aldabra
Taxonomy:

Nesillas aldabranus

Benson and Penny

, 1968,

400 m from western extremity of Middle Island, north coast of Aldabra Atoll

.

Monotypic.

Distribution:

Aldabra Atoll, N of Madagascar.

First discovered in 1967, and thereafter recorded only from type locality on Middle (or Malabar) I, on N coast of Aldabra Atoll. Occurred in a strip of dense coastal scrub 50 m wide running for 2 km along N coast of Middle I; estimated total of up to 25 individuals during mid-1970s. The population was subsequently extirpated, as last observed in 1983; none was found during extensive searches in 2003–2004. There is little suitable habitat on Aldabra, so populations never likely to have been large; probable causes of its extinction were nest predation by cats and rats and habitat destruction by goats and tortoises.

Descriptive notes

18–20 cm; 19·5 g. A large, strong-billed pale brown brush-warbler with long graduated tail of twelve feathers. Top of head and upperparts are warm brown, brighter, more... read more

Voice

Short “chikachoy” or “chak-chir”; other calls “tak”, repeated “tak-tak-tak”, and high-pitched... read more

Habitat

Dense closed-canopy scrub up to 5 m tall, with good leaf litter or soil layer; particularly with... read more

Food and feeding

Small invertebrates, including spiders (Araneae), beetles (Coleoptera), moths and caterpillars (Lepidoptera), winged ants (Hymenoptera),... read more

Breeding

Mainly Oct–Jan. Nest placed 0·6–3 m above ground in fork or between stems in young scrub or thicket; territory c. 0·75 ha,... read more

Movements

Sedentary.

Status and conservation

EXTINCT. First discovered in 1967, and thereafter recorded only from type locality near W end of Middle I, on N coast of Aldabra Atoll. Occurred in a strip of scrub 50 m wide... read more

Recommended citation

Pearson, D. (2019). Aldabra Brush-warbler (Nesillas aldabrana). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/58780 on 21 February 2019).