The black-footed ferret is roughly the size of a mink and is similar in appearance to the European polecat and the Asian steppe polecat. It is largely nocturnal and solitary, except when breeding or raising litters Up to 90% of its diet is composed of prairie dog

The species declined throughout the 20th century, primarily as a result of decreases in prairie dog populations and sylvatic plague. It was declared extinct in 1979, but a residual wild population was discovered in Meeteetse, Wyoming in 1981. A captive-breeding program launched by the United States Fish and Wildlife Service resulted in its reintroduction into eight western US states, Canada, and Mexico from 1991 to 2009. As of 2011, over 1,000 mature, wild-born individuals are in the wild across 18 populations, with four self-sustaining populations in South Dakota (two), Arizona, and Wyoming. It was first listed as "endangered" in 1982, then listed as "extinct in the wild" in 1996 before being downgraded back to "endangered" in the IUCN Red List in 2008 In February 2021, the first successful clone of a black-footed ferret, a female named Elizabeth Ann, was introduced to the public.

Worldwide, six of the seven sea turtle species are classified as threatened or endangered due to human actions and lifestyles. Bonaire is the home to three of the world’s six endangered or critically endangered species of marine turtles: the hawksbill, green, and loggerhead turtle.

The Malayan tapir grows to between 1.8 and 2.5 m (5 ft 11 in and 8 ft 2 in) in length, not counting a stubby tail of only 5 to 10 cm (2.0 to 3.9 in) in length, and stands 90 to 110 cm (2 ft 11 in to 3 ft 7 in) tall. It typically weighs between 250 and 320 kg (550 and 710 lb), although some adults can weigh up to 540 kg (1,190 lb).^{[8][9][10][11]} The females are usually larger than the males. Like other tapir species, it has a small, stubby tail and a long, flexible proboscis. It has four toes on each front foot and three toes on each back foot. The Malayan tapir has rather poor eyesight, but excellent hearing and sense of smell.

Underside of front (left) and back (right) hooves of the Malayan tapir

It has a large sagittal crest, a bone running along the middle of the skull that is necessary for muscle attachment. It also possesses unusually positioned orbits, an unusually shaped cranium with the frontal bones elevated, and a retracted nasal incision. All of these modifications to the normal mammal skull are, of course, to make room for the proboscis. This proboscis caused a retraction of bones and cartilage in the face during the evolution of the tapir, and even caused the loss of some cartilages, facial muscles, and the bony wall of the nasal chamber.

One the main reasons that panda populations have declined is habitat destruction. As the human population in China continues to grow, pandas' habitat gets taken over by development, pushing them into smaller and less livable areas. Habitat destruction also leads to food shortages.

Red pandas are often killed when they get caught in traps meant for other animals such as wild pigs and deer. They are also poached for their distinctive pelts in China and Myanmar. Red panda fur caps or hats have been found for sale in Bhutan.