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Five most recent topics
- Suggestions for new topics
- The taxonomic treatment of the Little Shearwater (Puffinus assimilis)/Audubon’s Shearwater (P. lherminieri) complex is being revised, and P. bryani is being recognised as a species: request for information
- Cory’s Shearwater (Calonectris diomedea) is being split: request for information on C. diomedea and C. borealis
- King Rail (Rallus elegans) is being split: request for information on R. elegans and R. tenuirostris.
- Sulawesi Scops-owl (Otus manadensis) is being split: list O. mendeni and O. sulaensis as Vulnerable?
Category Archives: Waterbirds
To suggest discussion of a species not listed in the forum, send a reply to this discussion. A moderator will assess the suitability of the topic and create a new topic if appropriate. Continue reading
American Coot (Fulica americana) and Caribbean Coot (F. caribaea) are being lumped as F. americana: list the newly defined species as Least Concern?
American Coot Fulica americana and Caribbean Coot F. caribaea are being lumped as F. americana, following the application of criteria set out by Tobias et al. (2010) and study of published information (Robertson and Baptista 1988, McNair and Cramer-Burke 2006, Sibley 2011). Continue reading
Silvery Grebe (Podiceps occipitalis) is being split: list P. juninensis as Near Threatened or Vulnerable?
Silvery Grebe Podiceps occipitalis is being split into P. occipitalis and P. juninensis, following the application of criteria set out by Tobias et al. (2010). Continue reading
Surveys carried out in Cuba – the most significant part of the species’s range both in size and population numbers – have shown the species to be more widespread on the main island and adjacent offshore islands than was previously thought. Present knowledge suggests that the species does not meet the thresholds for Vulnerable under any of the IUCN Red List criteria and may warrant downlisting. Continue reading
This discussion was first published as part of the 2013 Red List update, but remains open for comment to enable reassessment in 2014. Link to BirdLife species factsheet for Grey-tailed Tattler Grey-tailed Tattler Heteroscelus brevipes is currently listed as Least Concern because … Continue reading
Northern Screamer Chauna chavaria is endemic to the marshlands of northern Colombia and north-western Venezuela. It is listed as Vulnerable at the national level in the two countries in which it occurs, and may qualify as globally threatened. To confirm whether this is the case, more information is required, particularly on its status in Colombia, where the majority of the world population is found. Continue reading
Lesser Yellowlegs Tringa flavipes is listed as Least Concern on the basis that it is not believed to approach the thresholds for Vulnerable under any of the IUCN criteria. In recent years, evidence of declines in the population of T. flavipes has raised concerns over the species’s status. Up-to-date information is requested on this species’s population trend and the severity of potential threats. Continue reading
This discussion was first published as part of the 2013 Red List update, but remains open for comment to enable reassessment in 2014. BirdLife species factsheet for Brown Teal Brown Teal Anas chlorotis is endemic to New Zealand, where it was … Continue reading
Andean Flamingo (Phoenicoparrus andinus), Puna Flamingo (P. jamesi) and Chilean Flamingo (Phoenicopterus chilensis): downlist all to Least Concern?
Andean Flamingo Phoenicoparrus andinus is currently listed as Vulnerable under the A criterion, and James’s Flamingo P. jamesi and Chilean Flamingo Phoenicopterus chilensis are listed as Near Threatened under the A criterion. The results of surveys carried out for the International Simultaneous Census and Simultaneous Census of Network Sites in 2010 and six previous years since 1997 suggest that the population trends of these species are in fact stable or increasing (Marconi et al. in press). Continue reading
This discussion was first published as part of the 2013 Red List update, but remains open for comment to enable reassessment in 2014. BirdLife species factsheet for New Zealand Grebe New Zealand Grebe Poliocephalus rufopectus is endemic to New Zealand. It is … Continue reading
Sunda Teal Anas gibberifrons is being split into A. gibberifrons and A. albogularis, following the application of criteria set out by Tobias et al. (2010). Continue reading
Final decisions have been reached on the 2013 forum consultations. These are subject to approval and ratification by the IUCN. Continue reading
The attached spreadsheet lists preliminary decisions for the 2013 Red List update. Continue reading
Archived 2012-2013 topics: White-winged Flufftail (Sarothrura ayresi): uplist to Critically Endangered?
White-winged Flufftail Sarothrura ayresi occurs in Ethiopia (currently three sites in the central highlands, the only known breeding area for this species) (Taylor and van Perlo 1998, Taylor 1998, 1999), Zimbabwe (one record in 1988 [Hustler and Irwin 1995], two … Continue reading
BirdLife species factsheet for Brazilian Merganser Brazilian Merganser Mergus octosetaceus occurs at a few highly disjunct localities in south-central Brazil, with a few records from Argentina in 2002 (the first in the country for 10 years despite extensive surveys) (Benstead 1994, Hearn … Continue reading
In 2004, Laysan Duck Anas laysanensis was uplisted to Critically Endangered because new information suggested that its population was undergoing extreme fluctuations within its extremely small range on just one island, however following successful translocations, by the 2011 Red List update the population will be estimated to have been increasing for at least five years without the occurrence of extreme fluctuations. It is therefore proposed to downlist the species to Vulnerable under criterion D2. Continue reading
2011-2012 Forum topics Final decisions The attached spreadsheet lists the results of the 2012 forum consultations, subject to approval and ratification by IUCN. Please use the filters to look for your region or species group of interest. Any discussions of … Continue reading
2012 forum topics provisional decisions The attached spreadsheet lists preliminary decisions for the 2012 Red List. Please use the filters to look for your region or species group of interest. There will now be a further final opportunity to make … Continue reading
Greater Scaup Aythya marila breeds in tundra and moorland in northernmost Europe, Asia and North America, and winters in shallow coastal waters and occasionally inland water bodies south of its breeding grounds. The species is currently listed as Least Concern on the basis that it was not thought to approach the thresholds for Vulnerable under any of the IUCN criteria. An analysis of Christmas Bird Count data collected since the mid-1960s suggests that an annual population change of -3.4% has occurred across c.85% of the species’s range in North America, indicating a 75% decline between 1965-1966 and 2005-2006 (Butcher and Niven 2007), and suggesting a decline of c.57% over the last three generations.
Long-tailed Duck Clangula hyemalis is a widespread circumpolar species that breeds mainly in the Arctic tundra and winters generally to the south, mainly far offshore. It is currently listed as Least Concern because it was not thought to approach the thresholds for Vulnerable under any of the IUCN Red List criteria. Taking the 27-year decline rates calculated for the Baltic and North American populations, and assuming that the two other smaller populations have remained stable, the species’s global population may be declining at a rate of more than 50% over three generations, which would qualify the species for uplisting to Endangered under criterion A.
Archived 2011-2012 topics: Taxonomic changes in the genus Melanitta, part II: suggestions to list M. fusca as Endangered and M. deglandi as Least Concern, and request for information on M. stejnegeri
White-winged Scoter Melanitta fusca has been split into M. fusca, M. deglandi and M. stejnegeri 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 and comments are invited on whether the population of M. fusca is likely to have declined at a rate equivalent to 50-79% over the past three generations, and thus whether it qualifies for listing as Endangered under criterion A. Continue reading
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
Archived 2011-2012 topics: White-headed Steamerduck (Tachyeres leucocephalus): uplist to Vulnerable?
A recently published study estimated the total population at 3,428-3,673 adults (Agüero et al. 2011), suggesting that the current population estimate used by BirdLife is correct, but could be refined. However, Agüero et al. (2011) also provide evidence to suggest that the population is in decline. It is suggested that the species could qualify for uplisting to Vulnerable under criterion C2a(ii). Continue reading
Although BirdLife International does not yet have the capacity to assess global extinction risk at the subspecies level, we are 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. Continue reading
Archived 2011-2012 topics: Hooded Grebe (Podiceps gallardoi): does it qualify as Critically Endangered?
The results of surveys conducted on more than 50 lakes and lagoons that could hold breeding populations, including the six key waterbodies that held c.40% of the total population in the 1980s, suggest that the rate of decline may have been more rapid than previously thought (Imberti and Casañas 2010). When mean counts from the 1980s are summed across these six main sites, a total of 1,832 adults are estimated to have been recorded; however, surveys at these same sites in 2009 yielded records of only 117 adults. Furthermore, an estimated total of c.580 nests were recorded at these six sites during the 1980s, with not one found during the surveys in 2009 (Imberti and Casañas 2010). The difference in the number of adults recorded suggests that a decline of c.94% has occurred at these sites over c.24 years. This equates to a decline of 90.5% over the past 21 years, assuming an exponential trend. Continue reading
It has recently been noted that the species is becoming more difficult to find during birding tours, and that it could be in rapid decline owing to the on-going destruction of wetlands (P. Morris in litt. 2010). Further details are requested on the severity of threats and likely population trend. Continue reading
Baer’s Pochard Aythya baeri is currently classified as Endangered. Unconfirmed reports from eastern China suggest as many as 3,000 individuals may be hunted every year. If there was sufficient reason to believe the global population of Baer’s Pochard may have declined at a rate of at least 80% over three generations (23 years), then the species should be reassessed as Critically Endangered. Up to date counts from either breeding, passage or wintering sites would be extremely useful in enabling us to estimate population trends in this species. Continue reading
Orinoco Goose Neochen jubata is listed as Near Threatened under criteria A2c,d; A3c,d; A4c,d on the basis that it is suspected to be undergoing a continued decline of 1-19% over 10 years owing to heavy and ongoing hunting pressure. Recently, concern has been expressed over the conversion of suitable habitat in Venezuela for agriculture, particularly for rice cultivation, some of which is taking place in formerly protected areas (C. Sharpe in litt. 2010).
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
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
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
Noble Snipe Gallinago nobilis is currently listed as Least Concern because it was not believed to approach the thresholds for Vulnerable under any of the IUCN criteria. However, if the rates of habitat loss and intensity of hunting pressure described by Cisneros-Heredia (2006) for Ecuador are representative of threats throughout its range, this species could be experiencing an ongoing and moderately rapid decline, likely to be approaching 30% over 14 years (estimate of three generations).
Campbell Islands Teal Anas nesiotis was formally recognised by BirdLife International in 2000 and immediately listed as Critically Endangered under criterion D1, as it had a population of fewer than 50 mature individuals. Since 1999, a breeding, translocation and reintroduction programme has been successful in increasing the total population. Continue reading
Baikal Teal Anas formosa is listed as Vulnerable under criterion A3c on the basis that the population is projected to decline at a rate of 30-49% over 10 years, however counts of wintering individuals in South Korea have increased spectacularly over recent years, and if this species is indeed increasing, it might be eligible for downlisting. Continue reading