SNo Common name Binomial name Population Status Notes 1 São Tomé Ibis Bostrychia bocagei 70 – 400 CR 2 White-bellied Heron Ardea insignis 70 – 400 CR 3 Giant Ibis Thaumatibis gigantea 345 CR Minimum estimate. White-eared Night 4 Gorsachius magnificus 350 – 1500 EN Heron 5 Storm's Stork Ciconia stormi 400 – 500 EN 6 Crested Ibis Nipponia nippon 500 EN 7 White-shouldered Ibis Pseudibis davisoni 970 CR Minimum estimate. 8 Japanese Night Heron Gorsachius goisagi 1000 – 2499 EN 9 Fasciated Tiger Heron Tigrisoma fasciatum 1000 – 10 000 LC 10 Greater Adjutant Leptoptilos dubius 1200 – 1800 EN 11 Humblot's Heron Ardea humbloti 1500 EN Maximum estimate. 12 Australasian Bittern Botaurus poiciloptilus 1500 – 4000 EN 13 Malagasy Pond Heron Ardeola idae 2000 – 6000 EN 14 Malayan Night Heron Gorsachius melanolophus 2000 – 20 000 LC 15 Malagasy Sacred Ibis Threskiornis bernieri 2300 – 3250 EN 16 Forest Bittern Zonerodius heliosylus 2500 – 9999 NT 17 Black-faced Spoonbill Platalea minor 2693 EN 18 Oriental Stork Ciconia boyciana 3000 EN 19 Slaty Egret Egretta vinaceigula 3000 – 5000 VU 20 Chinese Egret Egretta eulophotes 3600 – 6400 VU 21 Milky Stork Mycteria cinerea 5000 VU Maximum estimate. Numbers could be 22 Lesser Adjutant Leptoptilos javanicus 6500 – 8000 VU underestimated. 23 Southern Bald Ibis Geronticus calvus 8000 – 10 000 VU 24 Madagascar Ibis Lophotibis cristata 10 000 NT 25 Puna Ibis Plegadis ridgwayi 10 000 – 15 000 LC 26 Jabiru Jabiru mycteria 10 000 – 25 000 LC 27 Sharp-tailed Ibis Cercibis oxycerca 10 000 – 25 000 LC 28 Painted Stork Mycteria leucocephala 15 000 – 25 000 NT Threskiornis 29 Black-headed Ibis 15 000 – 30 000 NT melanocephalus 30 Reddish Egret Egretta rufescens 15 000 – 30 000 NT Ephippiorhynchus 31 Black-necked Stork 15 000 – 35 000 NT asiaticus 32 Black Stork Ciconia nigra 24 000 – 44 000 LC 33 Black-faced Ibis Theristicus melanopis 25 000 – 100 000 LC 34 Agami Heron Agamia agami 50 000 – 499 999 VU Bare-throated Tiger 35 Tigrisoma mexicanum 50 000 – 499 999 LC Heron 36 Pinnated Bittern Botaurus pinnatus 50 000 – 499 999 LC 37 Black Bittern Ixobrychus flavicollis 63 000 – 320 000 LC 38 Eurasian Spoonbill Platalea leucorodia 66 000 – 140 000 LC 100 000 – 1 000 39 Pacific Reef Heron Egretta sacra LC 000 100 000 – 1 000 40 Yellow Bittern Ixobrychus sinensis LC 000 41 Eurasian Bittern Botaurus stellaris 110 000 – 340 000 LC 150 000 – 1 200 42 Striated Heron Butorides striata LC 000 180 000 – 1 300 43 Intermediate Egret Mesophoyx intermedia LC 000 44 Spot-breasted Ibis Bostrychia rara 200 000 – 510 000 LC 45 Purple Heron Ardea purpurea 270 000 – 570 000 LC 290 000 – 3 700 46 Grey Heron Ardea cinerea LC 000 500 000 – 4 999 47 Boat-billed Heron Cochlearius cochlearius LC 999 Black-crowned Night 510 000 – 3 600 48 Nycticorax nycticorax LC Heron 000 640 000 – 3 100 49 Little Egret Egretta garzetta LC 000 50 Straw-necked Ibis Threskiornis spinicollis 1 000 000 NT 51 White-faced Ibis Plegadis chihi 1 200 000 LC 3 800 000 – 7 600 52 Cattle Egret Bubulcus ibis LC 000

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Original source : en.wikipedia.org/wiki/List_of_Ciconiiformes_by_population