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Taxonomic




Order
Family
Species
Population
Discontinued Size - year Size Size estimate quality Size references Trend - year Trend Trend quality Trend references 1% threshold 1% yearset Notes
Gruiformes
Rallidae
Rallus longirostris (Mangrove Rail)
longirostris 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0
cypereti 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0
phelpsi 2011 - 2011 10,000 - 10,000 Best guess [R1182] 2006 - 2010 FLU Poor [R1182] 100 2012
margaritae 2011 - 2011 10,000 - 10,000 Best guess [R1182] 2006 - 2010 FLU Poor [R1182] 100 2012
Rallus obsoletus (Ridgway's Rail)
obsoletus 2005 - 2008 1,400 - 1,450 Expert opinion [R1119] 2000 - 2008 INC [R1119] 15 2012
Rallus longirostris (Mangrove Rail)
pelodramus 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0
crassirostris 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0
Rallus obsoletus (Ridgway's Rail)
levipes 2007 - 2007 1,320 - 1,330 Expert opinion [R1178] 1980 - 2007 INC [R1178] 15 2012 [S6096] [T4542]
yumanensis 1998 - 2008 5,200 - 8,380 [R1089] [R1276] 1998 - 2008 STA? No idea [R1089] 65 2012 [S6097]
beldingi 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0
Rallus tenuirostris (Mexican Rail)
tenuirostris 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0
Charadriiformes
Scolopacidae
Gallinago delicata (Wilson's Snipe)
delicata 0 - 0 2,000,000 - 2,000,000 [R473] 2003 - 2012 STA Good [R1007] 20000 2012 [P783]
Laridae
Larus armenicus (Armenian Gull)
Armenia, Eastern Turkey & NW Iran 1999 - 1999 69,000 - 75,000 Expert opinion [R557] 1990 - 2000 STA No idea [R66] 720 2012
Anseriformes
Anatidae
Oxyura ferruginea (Andean Duck)
andina 2011 - 2011 10,000 - 10,000 Expert opinion [R1010] 2001 - 2010 DEC Reasonable [R348] 100 2012 [P1365]
ferruginea, S American Andes 0 - 0 25,000 - 100,000 Best guess [R214] 1985 - 1995 DEC [R348] 1000 2012 [P1366]
Ciconiiformes
Ardeidae
Ixobrychus dubius (Australian Little Bittern)
dubius 1994 - 2010 1 - 10,000 Best guess [R341] [R1025] [R1041] [R1044] [R1103] 1982 - 2011 DEC? No idea [R1101] 100 2012 [P1820] [S7783] [T5714]
Threskiornithidae
Theristicus branickii (Andean Ibis)
branickii, W South America 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0 [P1916]
Anseriformes
Anatidae
Sarkidiornis sylvicola (American Comb Duck)
sylvicola 2005 - 2011 25,000 - 100,000 Best guess [R1070] [R1092] [R1183] [R1191] 2001 - 2010 DEC Poor [R15] 1000 2012 [P2133]
Gaviiformes
Gaviidae
Gavia stellata (Red-throated Loon)
North-west Europe (win) 1990 - 2000 150,000 - 450,000 Expert opinion [R63] 1990 - 2000 STA Poor [R63] 2600 2012
Caspian, Black Sea & East Mediterranean (win) 1990 - 2000 1 - 10,000 Best guess [R63] 1990 - 2000 STA No idea [R66] 100 2012 [S7046]
E Asia (non-bre) 0 - 0 10,000 - 100,000 Best guess [R714] 0 - 0 Unknown No idea 1000 2012
North America 0 - 0 40,000 - 40,000 [R40] 1977 - 1993 DEC [R40] 400 2012 [S7048] [T5878]
Gavia arctica (Arctic Loon)
arctica, Central Siberia/Caspian 0 - 0 -1 - -1 No estimate 0 - 0 Unknown No idea -1 0
arctica, Northern Europe & Western Siberia/Europe 1990 - 2000 250,000 - 500,000 Expert opinion [R63] 1990 - 2000 DEC Poor [R63] 3500 2012
viridigularis 1987 - 1991 25,000 - 1,000,000 Best guess [R519] 0 - 0 INC Reasonable 10000 2012 [T5880]
Gavia pacifica (Pacific Loon)
E Asia 1987 - 1991 25,000 - 100,000 Best guess [R519] 0 - 0 Unknown No idea 1000 2012 [P2072]
North America 2000 - 2000 900,000 - 1,500,000 [R687] 1971 - 1993 STA [R277] 11600 2012
Gavia immer (Common Loon)
Europe (win) 1985 - 2000 5,000 - 5,000 Expert opinion [R389] 1990 - 2000 STA No idea [R66] 50 2012
North America 0 - 0 607,000 - 635,000 Expert opinion [R1064] 0 - 0 No idea [R1064] 6200 2012 [T5884]
Gavia adamsii (Yellow-billed Loon)
Northern Europe (win) 2000 - 2005 1 - 10,000 Best guess [R668] 1990 - 2000 STA No idea [R66] 100 2012
North America 0 - 0 16,000 - 16,000 [R204] 0 - 0 Unknown No idea 160 2012 [S7056]
Podicipediformes
Podicipedidae
Rollandia rolland (White-tufted Grebe)
rolland 0 - 0 2,250 - 4,200 [R709] 0 - 0 Unknown No idea 30 2012
chilensis 1987 - 1991 100,000 - 100,000 [R497] 1990 - 2000 STA [R570] 1000 2012
morrisoni 1987 - 1991 1,000 - 1,000 [R497] 1977 - 1995 DEC [R497] 10 2012
Rollandia microptera (Titicaca Grebe)
microptera 2003 - 2003 1,600 - 1,600 Census based [R1024] 2003 - 2005 DEC Good [R495] 15 2012
Tachybaptus ruficollis (Little Grebe)
ruficollis, Europe & North-west Africa 1990 - 2000 300,000 - 510,000 Expert opinion [R63] 1997 - 2007 INC Reasonable [R888] 3900 2012 [T5225]
collaris 2001 - 2001 1 - 10,000 Best guess [R202] 0 - 0 Unknown No idea 100 2012
iraqensis 1987 - 1991 6,000 - 6,000 [R497] 0 - 0 Unknown No idea 60 2012
capensis, Sub-Saharan Africa 2001 - 2001 100,000 - 1,000,000 Best guess [R190] 0 - 0 Unknown No idea 10000 2012 [P1386]
albescens 0 - 0 100,000 - 1,000,000 Best guess [R32] 0 - 0 Unknown No idea 10000 2012 [P1387] [S7519]
poggei 2001 - 2001 100,000 - 1,000,000 Best guess [R124] 1990 - 2000 DEC [R693] 10000 2012 [P1388]
philippensis 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0 [P1389]
cotabato 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0
tricolor 0 - 0 -1 - -1 No estimate [R1081] 2001 - 2010 Unknown No idea -1 0 [S7523]
vulcanorum 0 - 0 -1 - -1 0 - 0 Unknown No idea -1 0 [P1392]
Tachybaptus rufolavatus (Alaotra Grebe)
Madagascar 0 - 0 1 - 10 1990 - 2000 DEC/EXT [R302] 1 2012 [P1404] [S7535]
Tachybaptus novaehollandiae (Australasian Grebe)
novaehollandiae 1994 - 2011 25,000 - 1,000,000 Best guess [R341] [R495] [R1101] 2001 - 2010 Unknown No idea 10000 2012 [S7525]
leucosternos 0 - 0 100 - 500 [R41] 1990 - 1998 INC [R41] 2 2012
rennellianus 2001 - 2001 100 - 500 [R202] 0 - 0 Unknown No idea 2 2012 [P1395]
javanicus 2006 - 2006 1 - 10,000 Best guess [R668] 0 - 0 Unknown No idea 100 2012
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Copyright Wetlands International 2012

Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on