Orange-bellied Antwren is endemic to north-east Brazil. It has been recorded in eight localities from the south-east escarpment of the Borborema plateau in Alagoas, north along this coastal range to Pernambuco. The species is listed as Endangered under B1ab(i,ii,iii,v);C2a(i). The species is known from a very small area (its Extent of Occurrence [EOO] was previously estimated at 130 km2 but has been revised to 12,800 km2 based on new method of calculation), within which it is severely fragmented. The population is estimated to number 250-999 mature individuals. A rapid and on-going population decline is suspected, owing to rates of habitat loss.
In the Brazilian Red List assessment for birds (MMA 2014) this species is listed as Critically Endangered under C2a(i). The population size is inferred to be <250 mature individuals with <50 mature individuals in each subpopulation. The population is in continuing decline owing to habitat loss. The species’s assessment on the Brazilian Red List can be accessed here.
Up-to-date information is requested on the species’s population size and subpopulation structure. Confirmation that the population is <250 mature individuals with <50 mature individuals in each subpopulation and that the population is in continuing decline would likely qualify the species for Critically Endangered under criterion C2a(i). Comments on the proposed uplisting are welcome.
MMA (2014) Lista Nacional Oficial de Espécies da Fauna Ameaçadas de Extinção. Portaria No 444, de 17 de dezembro de 2014. Diário Oficial da União – Seção 1. Nº 245, quinta-feira, 18 de dezembro de 2014.