The aye-aye is a unique and fascinating primate found only in Madagascar. It is known for its long, thin fingers, which it uses to tap on trees and locate grubs and insects to eat.

Poaching is the main threat to the Amur leopard's survival. Its beautiful fur makes it a target for illegal trade, and its habitat is also being destroyed by logging and development.

Spix's macaw is a stunningly beautiful bird that was once found in the rainforests of Brazil. It is now extinct in the wild due to habitat loss and illegal trapping for the pet trade.

Poaching is the primary threat to the Sumatran rhinoceros. Its horn is highly valued in traditional medicine, leading to rampant illegal hunting.

The narwhal is a unique and fascinating marine mammal found in the Arctic waters. It is known for its long, spiral tusk, which is actually an elongated canine tooth.

Poaching is the main threat to the Javan rhinoceros' survival. Its horn is highly valued in traditional medicine, leading to rampant illegal hunting.

The golden poison frog is a small but deadly amphibian found in the rainforests of Colombia. Its skin secretes a powerful toxin that can be fatal to humans.

Bycatch, the accidental capture of non-target species in fishing gear, is the primary threat to the vaquita's survival. It is often caught in gillnets used to catch shrimp and fish.

The Galapagos tortoise is one of the largest living species of tortoise and is found only on the Galapagos Islands. It is known for its long lifespan and unique adaptations to its environment.

Habitat loss due to deforestation and conversion of natural habitats for agriculture and development is the main threat to the Sumatran tiger's survival.

The helmeted hornbill is a large and striking bird found in the rainforests of Southeast Asia. It is known for its elaborate mating ritual, in which the male builds a nest and seals the female inside until she lays eggs.

Habitat loss due to deforestation and conversion of natural habitats for agriculture and development is the primary threat to the mountain gorilla's survival.

The Madagascar periwinkle is a small plant found only in the rainforests of Madagascar. It is known for its beautiful blue flowers and is a source of important medicinal compounds used in cancer treatment.

Whaling, the hunting of whales for their meat, oil, and other products, is the primary threat to the blue whale's survival. Despite international bans on whaling, illegal whaling still occurs.

The arapaima is a large and impressive fish found in the Amazon River. It is known for its unique appearance, with a long, cylindrical body and a bony tongue. It is a valuable food source for local communities, but overfishing has led to its critically endangered status.