Conservation Status

Status of crocodile populations

Population estimates and conservation status of the world’s crocodiles, alligators, caimans and the related gharials are given in the tables below.

IUCN Red List Status of the living crocdilians

The 23 living species are:

 

Species Scientific name IUCN Red List conservation status
American crocodile Crocodylus acutus Vulnerable
Orinoco crocodile Crocodylus intermedius Critically Endangered
Freshwater crocodile Crocodylus johnsoni Lower Risk/least concern
Philippine crocodile Crocodylus mindorensis Critically Endangered
Morelet’s crocodile or Mexican crocodile Crocodylus moreletii Lower Risk/Least Concern
Nile crocodile Crocodylus niloticus Lower Risk/least concern
New Guinea crocodile Crocodylus novaeguineae Lower Risk/least concern
Mugger crocodile, marsh crocodile, or Indian crocodile Crocodylus palustris Vulnerable
Saltwater crocodile or estuarine crocodile Crocodylus porosus Lower Risk/least concern
Dwarf crocodile Osteolaemus tetraspis Vulnerable
Cuban crocodile Crocodylus rhombifer Critically Endangered
Siamese crocodile Crocodylus siamensis Critically Endangered
Slender-snouted crocodile Mecistops cataphractus Critically Endangered
American alligator Alligator mississippiensis Lower Risk/least concern
Chinese alligator Alligator sinensis Critically Endangered
Spectacled caiman Caiman crocodilus Lower Risk/Least Concern
Broad-snouted caiman Caiman latirostris Lower Risk/Least Concern
Yacaré caiman Caiman yacare Lower Risk/Least Concern
Black caiman Melanosuchus niger Lower Risk/conservation Dependent
Cuvier’s dwarf caiman Paleosuchus palpebrosus Lower Risk/Least Concern
Schneider’s dwarf caiman or smooth-fronted caiman Paleosuchus trigonatus Lower Risk/Least Concern
False gharial Tomistoma schlegelii Vulnerable
Gharial Gavialis gangeticus Critically Endangered

Population Estimates

Species Scientific name Estimated population in the wild
American crocodile Crocodylus acutus ~ 20,000
Orinoco crocodile Crocodylus intermedius 100-250
Freshwater crocodile Crocodylus johnsoni ~ 100,000
Philippine crocodile Crocodylus mindorensis Less than 150
Morelet’s crocodile or Mexican crocodile Crocodylus moreletii 79,000-100,000
Nile crocodile Crocodylus niloticus 50,000-70,000
New Guinea crocodile Crocodylus novaeguineae 100,000
Mugger crocodile, marsh crocodile, or Indian crocodile Crocodylus palustris 5,700 to 8,700
Saltwater crocodile or estuarine crocodile Crocodylus porosus >200,000
Dwarf crocodile Osteolaemus tetraspis 25,000 to 100,000
Cuban crocodile Crocodylus rhombifer 3,000 to 5,000
Siamese crocodile Crocodylus siamensis 500 – 1,000
Slender-snouted crocodile Mecistops cataphractus <20,000*
American alligator Alligator mississippiensis More than 1,000,000
Chinese alligator Alligator sinensis Less than 200
Spectacled caiman Caiman crocodilus  3,000,000
Broad-snouted caiman Caiman latirostris 250,000 to 500,000
Yacaré caiman Caiman yacare > 200,000
Chinese alligator Alligator sinensis ~150
Black caiman Melanosuchus niger >1,000,000
Cuvier’s dwarf caiman Paleosuchus palpebrosus >1,000,000
Schneider’s dwarf caiman or smooth-fronted caiman Paleosuchus trigonatus > 1,000,000
Tomistoma Tomistoma schlegelii  2,500 – 10,000
Gharial Gavialis gangeticus 650 – 1,000

*figures include both species of slender-snouted crocodiles

Note that some of the figures above represent mature animals only, other include total population estimates.

References

The IUCN Red List of Threatened Species, https://www.iucnredlist.org/, various species accounts accessed on 2 April 2020.

Crocodile Specialist Group website, http://www.iucncsg.org/pages/Conservation-Status.html

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