This discussion was first published as part of the 2016 Red List update. At the time a decision regarding its status was pended, but to enable potential reassessment of this species as part of the 2017 Red List update this post remained open and the date of posting was updated.
Alagoas Tyrannulet is found in Alagoas and Pernambuco states, north-east Brazil. The species is listed as Endangered under B1ab(i,ii,iii,v); C2a(ii). The species is known from 10 locations within a very small, severely fragmented and declining range. The Extent of Occurrence (EOO) was previously estimated at approximately 110 km2 but has been recalculated following revised IUCN guidelines at 20,200 km2. The population is estimated to number 250-999 mature individuals and is suspected to be undergoing a rapid population decline owing to severe habitat loss and fragmentation.
In the Brazilian Red List assessment for birds (MMA 2014) this species is listed as Critically Endangered under C2a(i). The species’s population is severely fragmented and is undergoing a continuing decline due to reductions in habitat quality and Area of Occupancy (AOO). It is inferred that the current population does not exceed 250 mature individuals and each subpopulation does not contain more than 50 individuals. The species’s assessment on the Brazilian Red List can be accessed here.
Up-to-date information is requested on the species’s current population size and subpopulation structure. Confirmation that the population is <250 mature individuals with no more than 50 mature individuals in each subpopulation 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.