This discussion was first published on Dec 2 2010 as part of the 2010-2011 Red List update, but remains open for comment to enable reassessment in 2013.
Great-billed Seed-finch Oryzoborus maximiliani is listed as Near Threatened under criteria A2c,d; A3c,d; A4c,d on the basis that it is suspected to be undergoing a slow to moderately rapid population decline, estimated at 1-19% over 10 years, as suggested by localised declines in abundance and its disappearance from parts of its range, probably owing to trapping for the cagebird trade (Ridgely and Tudor 1989), as well as habitat loss and degradation driven by logging and the expansion of agriculture.
This species was described by Restall et al. (2006) as very local and rare throughout its range. Although its population size has apparently not been estimated, given its scarcity the species must have a very small population. It continues to be very scarce in Brazil, with perhaps the only reliable locality being Emas National Park (A. C. De Luca in litt. 2010). These observations have prompted a review of the species’s status.
Up-to-date information is requested, in particular the likely total population size, the current population trend over 11 years (estimate of three generations) and the severity of threats. Any evidence pointing towards an overall decline of at least 30% over 11 years would make the species eligible for at least Vulnerable status under the A criterion.
Restall, R., Rodner, C. and Lentino, M. (2006) Birds of Northern South America: An Identification Guide. London, UK: Christopher Helm.
Ridgely, R. S. and Tudor, G. (1989) The birds of South America. Austin, Texas: University of Texas Press.
- Archived 2011-2012 topics: Large-billed Seed-finch (Oryzoborus crassirostris): request for information
- Rio de Janeiro Antbird (Cercomacra brasiliana): request for information
- Pale-billed Antpitta (Grallaria carrikeri): uplist to Near Threatened?
- Archived 2010-2011 topics: Cochabamba Mountain-finch (Compsospiza garleppi): request for information
- Lesser Yellowlegs (Tringa flavipes): request for information