Category Archives: North America

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Archived 2011-2012 topics: Taxonomic changes in the genus Melanitta, part I: suggestion to list M. nigra as Vulnerable and request for information on M. americana

Black Scoter Melanitta nigra has been split into M. nigra and M. americana following a review of recent literature (Livezey 1995, Garner et al. 2004, Sangster et al. 2005, Collinson et al. 2006, AOU 2010) and museum specimens by the BirdLife Taxonomic Working Group. Further information is requested on population trends in these two newly-split species and comments are invited on whether the population of M. nigra is likely to have declined at a rate equivalent to at least 30% over the past three generations, and thus if it qualifies for listing as at least Vulnerable under criterion A. Continue reading

Posted in Americas, Archive, Asia, Europe & Central Asia, North America, Waterbirds | 11 Comments

Archived: How many subspecies have gone extinct in the Neotropics?

BirdLife International is currently working on a project to produce a synthesis of all bird taxa, at the species and subspecies level, that are known or thought to have gone extinct since 1500. This is the first time that subspecies extinctions have been systematically documented and analysed, and we hope that the results will provide new insights to support global efforts (including through the BirdLife Partnership) to conserve the world’s threatened birds. Subspecies extinctions are generally not well documented, and so we would greatly appreciate any information and updates (including on recent surveys or rediscoveries) to support this effort. Continue reading

Posted in Americas, Archive, Caribbean, Central America, North America, Parrots, South America | 4 Comments

Archived 2011-2012 topics: Orange-breasted Falcon (Falco deiroleucus): request for information

A detailed study by Berry et al. (2010) highlights the overall population decline and range contraction observed in this species and cites a number of threats that are likely to be impacting it. Estimating the rate of decline in widespread species is always challenging, but further information and data are nevertheless required in order to assess this species’s threat status. Continue reading

Posted in Americas, Archive, Central America, North America, South America | Tagged | 7 Comments

Archived 2011-2012 topics: Yellow-naped Amazon (Amazona auropalliata): is it eligible for uplisting?

The species is regarded as declining, probably throughout its range, owing to habitat loss and degradation, driven primarily by the expansion of agriculture, and capture for local and international trade (Juniper and Parr 1998, Anon. 2008). Further information is requested on the severity of threats and likely rate of decline over the last 37 years and projected rate of decline over the next 37 years. Continue reading

Posted in Americas, Archive, Central America, North America, Parrots | Tagged | 2 Comments

Archived 2011-2012 topics: Thick-billed Parrot (Rhynchopsitta pachyrhyncha): request for information

Thick-billed Parrot R. pachyrhyncha is listed as Endangered under criterion C2a(ii) on the basis that its population numbers fewer than 2,500 mature individuals and is suspected to be declining due to the clearance and degradation of its habitat. Recently, concerns have been expressed to us that this population estimate may be incorrect by an order of magnitude, as there are apparently fewer than 100 active nests each year (J. Gilardi in litt. 2010). Continue reading

Posted in Archive, North America, Parrots | Tagged | 1 Comment

Archived 2011-2012 topics: Colima Warbler Vermivora crissalis: downlist to Least Concern?

Colima Warbler Vermivora crissalis is currently listed as Near Threatened, however there appears to be no evidence that the species’s population is declining moderately rapidly and its Extent of Occurrence is estimated to be 100,000 km2. Furthermore, there do not appear to be any current severe threats and the species is tolerant of some habitat disturbance. Therefore, it does not appear to approach the Red List thresholds for either criteria and it may require downlisting to Least Concern. Continue reading

Posted in Archive, North America | Tagged | 2 Comments

Archived 2011-2012 topics: Tufted Jay (Cyanocorax dickeyi): request for information

Tufted Jay Cyanocorax dickeyi is listed as Near Threatened under criterion B1a+b(i,ii,iii,v) on the basis that it has a moderately small range, in which it faces the limited threats of habitat clearance and degradation owing to agricultural encroachment and logging. Up-to-date information is requested on this species’s likely population size, current trend over 18 years (estimate of three generations) and the severity of threats, to help in the assessment of its status.
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Posted in Archive, North America | Tagged | 2 Comments

Archived 2011-2012 topics: Yucatan Wren (Campylorhynchus yucatanicus): request for information

Yucatan Wren Campylorhynchus yucatanicus is currently listed as Near Threatened because although it has a small range and moderately small population, its range is not considered to be severely fragmented or restricted to a few locations. Further information on threats and likely trends in this species’s range and population is sought.
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Posted in Archive, North America | Tagged | 1 Comment

Archived 2011-2012 topics: Bearded Screech-owl (Megascops barbarus): request for information

Bearded Screech-owl Megascops barbarus is listed as Near Threatened on the basis that it occupies a moderately small range, which is suspected to be in decline owing to the loss and degradation of its habitat. Its revised Extent of Occurrence does not approach the threshold for Vulnerable, and up-to-date information is requested on this species’s likely population size, current rate of population decline over 21 years (estimate of three generations) and the severity of threats, in order to help assess its status. Continue reading

Posted in Archive, Central America, North America | Tagged | 2 Comments

Archived 2011-2012 topics: Spotted Owl (Strix occidentalis): downlist to Least Concern?

Spotted Owl em>Strix occidentalis is currently listed as Near Threatened as its population was estimated to approach the threshold for Vulnerable and was previously suspected to be undergoing a decline, however by the 2011 Red List update, this species will have been considered to be stable and possibly increasing in the USA for five years, making it eligible for downlisting to Least Concern. Comments are invited on this potential category change. Continue reading

Posted in Archive, North America | Tagged | 6 Comments

Archived 2011-2012 topics: Black-footed Albatross (Phoebastria nigripes): eligible for downlisting?

Black-footed Albatross Phoebastria nigripes is currently listed as Endangered under criterion A4b,d, on the basis that its population is projected to decline by more than 60% over 56 years (estimate of three generations), as modelled using a moderate scenario for fisheries bycatch of 8,000 birds per year (Lewison and Crowder 2003). The recent analysis presented by Arata et al. (2009) brings into question the validity of the species’s current Red List status. It suggests that the rate of projected decline should be lowered, which could result in the species becoming eligible for downlisting. Continue reading

Posted in Archive, Asia, Hawaii, North America, Pacific, Seabirds | Tagged | 2 Comments

Archived 2011-2012 topics: Semipalmated Sandpiper (Calidris pusilla): request for information

Semipalmated Sandpiper Calidris pusilla is listed as Least Concern on the basis that it does not approach the thresholds for Vulnerable under any of the IUCN criteria. Recent population trends appear to have been negative for this species in many areas. Up-to-date information is requested on this species, in particular the likely population trend and the severity of threats. Continue reading

Posted in Archive, Caribbean, Central America, North America, South America, Waterbirds | Tagged | 4 Comments

Archived 2011-2012 topics: Mexican Sheartail (Doricha eliza): request for information

Mexican Sheartail Doricha eliza is currently listed as Near Threatened, as although it has a small range and moderately small, declining population is not considered to be severely fragmented or restricted to a few locations. Up-to-date information is requested on this species’s total population size, estimated rate of decline and the severity of threats. Continue reading

Posted in Archive, North America | Tagged | 4 Comments

Archived 2011-2012 topics: Sumichrast’s Wren (Hylorchilus sumichrasti): request for information

Sumichrast’s Wren Hylorchilus sumichrasti is currently listed as Near Threatened, however with an Extent of Occurrence now estimated at 997 km2, the species’s population is likely to have been overestimated and the species could potentially qualify as Vulnerable or Endangered. Up-to-date information is sought on the likely population size and structure, and the level of habitat fragmentation within this species’s range. Continue reading

Posted in Archive, North America | Tagged | 1 Comment

Archived: 2011 Red List final decisions

The discussion period for the 2011 Red List has now finished and final decisions have been taken – these decisions will be incorporated into the 2011 Red List, which will be released by BirdLife in May 2011, and by IUCN … Continue reading

Posted in Africa, Americas, Archive, Asia, Australia, Caribbean, Central America, Europe & Central Asia, Galliformes, Hawaii, Middle East, North America, Pacific, Parrots, Seabirds, South America, Waterbirds | Leave a comment

Archived: 2011 Red List draft decisions

The attached spreadsheets list the draft decisions for the 2011 IUCN Red List. There is now a final opportunity for comments on these proposals prior to a final deadline of 21 February 2011. Africa 2010-2011 Americas 2010-2011 Asia 2010-2011 Europe … Continue reading

Posted in Africa, Americas, Archive, Asia, Australia, Caribbean, Central America, Europe & Central Asia, Galliformes, Hawaii, Middle East, North America, Pacific, Parrots, Seabirds, South America, Waterbirds | 1 Comment

Archived 2010-2011 topics: Belted Flycatcher (Xenotriccus callizonus): downlist to Least Concern?

Belted Flycatcher Xenotriccus callizonus is listed as Near Threatened on the IUCN Red List because it was thought to have a restricted range that approaches the threshold for listing as Vulnerable. However, this species has been mapped by Natureserve/BirdLife International as having an estimated Extent of Occurrence (EOO) of 56,900 km2, hence it does not appear to approach the IUCN thresholds and appears to warrant downlisting to Least Concern. Continue reading

Posted in Archive, Central America, North America | Tagged | 2 Comments

Archived 2010-2011 topics: Black Catbird (Melanoptila glabrirostris): uplist to Vulnerable?

Black Catbird Melanoptila glabrirostris is currently classified as Near Threatened, however if rapid habitat loss has led to population declines of >30% over the past 10 years, the species would warrant uplisting to Vulnerable.

(This discussion was first posted as part of the 2009 Red List update) Continue reading

Posted in Archive, Central America, North America | Tagged | 2 Comments

Archived 2010-2011 topics: Maroon-fronted Parrot (Rhynchopsitta terrisi): uplist to Endangered?

Maroon-fronted Parrot Rhynchopsitta terrisi is currently listed as Vulnerable under criterion B1 of the IUCN Red List owing to its small range and declining area of habitat. Recently, it has been suggested that the population size has been over-estimated for this species (J. Gilardi in litt. 2010), so up-to-date information is requested. Continue reading

Posted in Archive, North America, Parrots | Tagged | 4 Comments

Archived 2010-2011 topics: Belding’s Yellowthroat (Geothlypis beldingi): downlist to Endangered?

Belding’s Yellowthroat Geothlypis beldingi is currently listed as Critically Endangered under criterion B1a+b(i,ii,iii,iv,v) on the basis that it was considered to have an Extent of Occurrence (EOO) estimated at less than 100 km2, in which its habitat is severely fragmented and the population is suspected to be declining due to habitat loss and degradation caused by fires, reed-cutting for construction, and drainage for conversion to cultivation and pasture (Rodríguez-Estrella et al. 1999). Erickson et al. (2008) published new localities for the species and indicated that its dispersal capabilities may be better than previously thought.
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Posted in Archive, North America | Tagged | 1 Comment

Archived 2010-2011 topics: Military Macaw (Ara militaris): request for information

Military Macaw Ara militaris is listed as Vulnerable under criteria A2c,d; A3c,d; A4c,d on the basis that a population decline equivalent to 30-49% over 10 years is suspected in the past and projected in the future, owing to habitat loss and harvesting for the pet trade (Snyder et al. 2000). Recently it has been noted that the species appears to be rarely traded in Bolivia, where good numbers are protected in five national parks (B. Hennessey in litt.). This raises the question of whether the population is still in rapid decline.
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Posted in Archive, Central America, North America, Parrots, South America | Tagged | 4 Comments