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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
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]
Ixobrychus novaezelandiae (New Zealand Little Bittern)
New Zealand 0 - 0 0 - 0 No quality assessment [R534] 1982 - 1992 EXT No quality assessment [R534] -1 -1 [P1825]
Ixobrychus sinensis (Yellow Bittern)
Seychelles 0 - 0 1 - 300 No quality assessment [R552] 1991 - 2001 DEC No quality assessment [R597] 1 2012
South Asia 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1
E & SE Asia 2006 - 2006 100,000 - 1,000,000 Best guess [R668] 1985 - 2005 INC No quality assessment [R668] 10000 2012 [S7786]
Ixobrychus eurhythmus (Schrenck's Bittern)
E & SE Asia 0 - 0 1 - 25,000 Best guess [R395] 1985 - 1995 DEC No quality assessment [R395] 250 2012
Ixobrychus cinnamomeus (Cinnamon Bittern)
South Asia 1987 - 1991 25,000 - 1,000,000 Best guess [R519] 0 - 0 Unknown No idea 10000 2012
E, SE Asia 2006 - 2006 100,000 - 1,000,000 Best guess [R668] 1985 - 2005 STA No quality assessment [R668] 10000 2012
Ixobrychus sturmii (Dwarf Bittern)
Sub-Saharan Africa 1990 - 2000 25,000 - 100,000 Best guess [R232] 1990 - 2000 STA No idea [R66] 1000 2012
Ixobrychus flavicollis (Black Bittern)
flavicollis, South Asia 1987 - 1991 25,000 - 100,000 Best guess [R519] 0 - 0 Unknown No idea 1000 2012 [P1845]
flavicollis, E, SE Asia 2006 - 2006 10,000 - 100,000 Best guess [R668] 0 - 0 Unknown No idea 1000 2012
australis, Australia, New Guinea 1999 - 2002 10,000 - 100,000 Best guess [R267] [R1027] [R1101] 1991 - 2000 DEC Poor [R267] 1000 2012 [P1847] [S7811]
australis, Timor 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1
australis, Rennell Island 2001 - 2001 1 - 500 No quality assessment [R202] 0 - 0 Unknown No idea 1 2012 [P1849]
australis, New Britain, New Ireland 2001 - 2001 1 - 10,000 Best guess [R202] 0 - 0 Unknown No idea 100 2012 [P1850]
woodfordi 2001 - 2001 1 - 10,000 Best guess [R202] 0 - 0 Unknown No idea 100 2012
Gorsachius magnificus (White-eared Night-heron)
SE Asia 2000 - 2000 250 - 1,000 No quality assessment [R65] 1995 - 2005 DEC No quality assessment [R64] 5 2012 [S7745]
Gorsachius goisagi (Japanese Night-heron)
E & SE Asia 2005 - 2005 250 - 1,000 No quality assessment [R64] 1975 - 1995 DEC No quality assessment [R64] 5 2012
Gorsachius melanolophus (Malay Night-heron)
South Asia 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1
SE Asia 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1
Philippines 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1 [P1787]
Palawan, Philippines 0 - 0 1 - 10,000 Best guess [R395] 0 - 0 Unknown No idea 100 2012 [P1788]
Nicobar Is 0 - 0 1 - 10,000 Best guess [R395] 0 - 0 Unknown No idea 100 2012 [P1789]
Calherodius leuconotus (White-backed Night-heron)
Africa 0 - 0 25,000 - 100,000 Best guess [R192] 1991 - 2001 STA No quality assessment [R190] 1000 2012 [P1782]
Nycticorax duboisi (Reunion Night-heron)
Reunion 2005 - 2005 0 - 0 No quality assessment [R64] 1750 - 2005 EXT No quality assessment [R64] -1 -1 [P527] [S6623]
Nycticorax mauritianus (Mauritius Night-heron)
Mauritius 2005 - 2005 0 - 0 No quality assessment [R64] 1750 - 2005 EXT No quality assessment [R64] -1 -1 [P525] [S6621]
Nycticorax megacephalus (Rodrigues Night-heron)
Rodrigues 2005 - 2005 0 - 0 No quality assessment [R64] 1800 - 2005 EXT No quality assessment [R64] -1 -1 [P528] [S6624]
Nycticorax nycticorax (Black-crowned Night-heron)
nycticorax, W Europe, NW Africa (bre) 2000 - 2005 61,000 - 97,000 Expert opinion [R431] 1990 - 2000 INC Poor [R1281] 770 2012 [P1762] [T5657]
hoactli, Caribbean 2006 - 2007 6,000 - 12,300 No quality assessment [R1021] 0 - 0 Unknown No idea 85 2012 [P1763] [S7727]
hoactli, northern South America (bre) 2005 - 2010 50,000 - 50,000 Best guess [R1092] [R1183] [R1191] 2001 - 2010 STA Poor [R1092] [R1183] [R1191] 500 2012 [P1764]
obscurus 2001 - 2001 25,000 - 1,000,000 Best guess [R570] 0 - 0 Unknown No idea 10000 2012
falklandicus, Falkland Islands (Malvinas) 0 - 0 5,700 - 10,800 No quality assessment [R709] 0 - 0 Unknown No idea 80 2012 [S7730]
nycticorax, C & E Europe/Black Sea & E Mediterranean (bre) 1990 - 2000 92,100 - 138,000 Expert opinion [R668] 1990 - 2000 INC Poor [R63] 1100 2012 [P1769] [T5662]
nycticorax, Western Asia/SW Asia & NE Africa 2002 - 2002 25,000 - 100,000 Best guess [R579] 1990 - 2000 STA No idea [R66] 1000 2012
nycticorax, Sub-Saharan Africa & Madagascar 2001 - 2001 25,000 - 1,000,000 Best guess [R190] 1991 - 2001 STA Poor [R190] 10000 2012
nycticorax, South Asia 0 - 0 100,000 - 150,000 No quality assessment [R32] 1977 - 1991 STA No quality assessment [R519] 1200 2012 [S7734]
nycticorax, E, SE Asia 2006 - 2006 100,000 - 1,000,000 Best guess [R668] 1981 - 1991 STA No quality assessment [R124] 10000 2012
hoactli, North America (bre) 1999 - 2011 75,000 - 150,000 Expert opinion [R106] 1990 - 2000 STA No quality assessment [R570] 1100 2012 [P1774] [S7736]
hoactli, Mexico 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1 [P1775]
hoactli, Central America 2005 - 2005 9,600 - 24,900 No quality assessment [R1114] 0 - 0 Unknown No idea 150 2012 [P1776]
Nycticorax caledonicus (Rufous Night-heron)
caledonicus 0 - 0 2,000 - 4,000 No quality assessment [R41] 1990 - 2000 STA No quality assessment [R41] 30 2012
manillensis 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1 [P1778]
pelewensis 2001 - 2001 1 - 10,000 Best guess [R202] 0 - 0 Unknown No idea 100 2012
mandibularis 2001 - 2001 10,000 - 100,000 Best guess [R202] 0 - 0 Unknown No idea 1000 2012 [P1780]
hilli 2004 - 2011 25,000 - 1,000,000 Best guess [R341] [R1101] [R1149] [R1150] 1982 - 2011 FLU Poor [R1101] [R341] 10000 2012 [S7743] [T5674]
Nyctanassa violacea (Yellow-crowned Night-heron)
violacea, North America 0 - 0 75,000 - 150,000 No quality assessment [R106] 1966 - 2000 STA No quality assessment [R563] 1100 2012 [P1754]
violacea, Mexico to Honduras 0 - 0 -1 - -1 No estimate 0 - 0 Unknown No idea -1 -1 [P1755] [S7720]
violacea, Socorro Island 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1 [P1756]
caliginis 2004 - 2004 900 - 900 Best guess [R1008] 1982 - 1992 STA No quality assessment [R482] 9 2012
cayennensis 0 - 0 -1 - -1 No quality assessment 0 - 0 Unknown No idea -1 -1
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Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on