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White-breasted thrasher
The white-breasted thrasher (''Ramphocinclus brachyurus''), also known as Goj blan in Creole, is a species of bird in the Mimidae family. Semper and Sclater (1872) describe the white-breasted thrasher as an "inquisitive and noisy bird" that would often "keep up a constant warning chatter, and throw itself about in all sorts of contortions" when being disturbed.〔Semper JE, Sclater PL. 1872. Observation on the birds of St Lucia. Proceedings of the Zoological Society of London. 647-653.〕 It is endemic to Martinique and Saint Lucia, two islands of the Lesser Antilles. This resident species is easy to find within their range; however, it is classified as endangered by the IUCN Red List of Threatened Species mainly due to its restricted habitat.〔BirdLife International. 2012. ''Ramphocinclus'' brachyurus. TheIUCN RedList of Threatened Species. International Union for Conservation of Nature. Retrieved 29 September 2015.〕
== Description ==
The white-breasted thrasher is in average 23 to 25 cm long, and weight from 48 to 60 g depending on sex and subspecies.〔Benstead P, Isherwood I, Mahood S, Pople R, Sharpe C J, Temple H, Wege D. 2015. Species factsheet: ''Ramphocinclus brachyurus''. BirdLife International; (2015 Sept. 29 ). Available from: (http://www.birdlife.org )〕 An adult bird has a dark brown plumage with a white throat, breast, and belly. Its dark beak is long and slightly decurved towards the tip. Several dark bristles are located around the lores, between the red eyes and nostrils of the bird.〔 This medium-sized passerine has long and strong black legs and can live up to 7–8 years.〔Gros-Désormeaux JR, Lesales T, Tayalay AG. 2012. Ethologie du moqueur gorge blanche ''Ramphocinclus brachyurus''. Technical report. CIHENCE. Available from: http://www.pnr-martinique.com/wp-content/uploads/2012/11/rapport-ethologie_CIHENCE_11102012.pdf〕 Males and females are sexually monomorphic, thus identical in size and coloration. This bird is difficulty sexed by hand or sight due to sexual monomorphism. Males and females have the same plumage and only breeding females can be identified during breading season by their brood patch.〔Mortensen J, Freeman K, Morton M. 2014. White-breasted Thrasher (''Ramphocinclus brachyurus''), Neotropical Birds Online. Ithaca: The Cornell Lab of Ornithology Neotropical Birds; (2015 Sept. 29 ). Available from: http://neotropical.birds.cornell.edu/portal/species/overview?p_p_spp=559116〕
The plumage of an immature white-breasted thrasher is uniformly brown, with a brown throat and a greyish belly. The white patch on its breast will develop with age, around a month later. When the bird is in its first year, it can be differentiated to an adult bird by the rusty brown colour of its upper-parts, and its brownish eye color.〔
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