All of the above species are critically endangered in India. The Asian elephant is threatened by habitat loss and poaching, the Bengal tiger is threatened by poaching and habitat loss, and the snow leopard is threatened by climate change and habitat loss.

Habitat loss is the main cause of the critically endangered status of the Sumatran orangutan. The orangutan's habitat is being destroyed by deforestation for agriculture, logging, and mining.

The African elephant is not a critically endangered species. It is listed as vulnerable by the IUCN.

Bycatch is the main cause of the critically endangered status of the vaquita. The vaquita is often caught in fishing nets as bycatch.

All of the above species are critically endangered in the United States. The California condor is threatened by habitat loss and lead poisoning, the whooping crane is threatened by habitat loss and hunting, and the Florida panther is threatened by habitat loss and vehicle collisions.

Poaching is the main cause of the critically endangered status of the black rhinoceros. The black rhinoceros is poached for its horn, which is used in traditional medicine.

All of the above species are critically endangered in China. The giant panda is threatened by habitat loss and poaching, the South China tiger is threatened by habitat loss and poaching, and the Chinese alligator is threatened by habitat loss and pollution.

Habitat loss is the main cause of the critically endangered status of the golden lion tamarin. The golden lion tamarin's habitat is being destroyed by deforestation for agriculture and logging.

All of the above species are critically endangered in Brazil. The golden lion tamarin is threatened by habitat loss, the black-lion tamarin is threatened by habitat loss and poaching, and the maned wolf is threatened by habitat loss and hunting.

Poaching is the main cause of the critically endangered status of the Javan rhinoceros. The Javan rhinoceros is poached for its horn, which is used in traditional medicine.

All of the above species are critically endangered in Indonesia. The Sumatran orangutan is threatened by habitat loss, the Javan rhinoceros is threatened by poaching, and the Komodo dragon is threatened by habitat loss and hunting.

Poaching is the main cause of the critically endangered status of the Amur leopard. The Amur leopard is poached for its fur, which is used in traditional medicine.

All of the above species are critically endangered in Russia. The Amur leopard is threatened by poaching, the Siberian tiger is threatened by poaching and habitat loss, and the snow leopard is threatened by climate change and habitat loss.

Habitat loss is the main cause of the critically endangered status of the mountain gorilla. The mountain gorilla's habitat is being destroyed by deforestation for agriculture and logging.

All of the above species are critically endangered in Africa. The mountain gorilla is threatened by habitat loss, the chimpanzee is threatened by habitat loss and poaching, and the bonobo is threatened by habitat loss and poaching.