Bottlenose Dolphin
Where they live: Scotland, Caribbean, New Zealand, other places
Conservation Status: Bottlenose dolphins are not endangered. Their future is stable because of their abundance and high adaptability. However, some specific populations are threatened due to various environmental changes. The population in the Moray Firth in Scotland is estimated to consist of around 150 animals and is declining by around 6% per year due to the impact of harassment and traumatic death, water pollution and reduction in food availability.

Cheetah
Other name: Acinonyx jubatus
Where they live: Africa and Asia
Conservation Status: Endangered. Cheetah cubs have a high mortality rate due to genetic factors and predation by carnivores in competition with the cheetah, such as the lion and hyena. Recent inbreeding causes cheetahs to share very similar genetic profiles. This has led to poor sperm, birth defects, cramped teeth, curled tails, and bent limbs. Some biologists now believe that they are too inbred to flourish as a species

Killer Whale
Other names: Orca (Orcinus orca), less commonly, Blackfish or Seawolf
Where you can find them: It is found in all the world's oceans, from the frigid Arctic and Antarctic regions to warm, tropical seas
Conservation Status: Although the Killer Whale Population as a whole is not considered to be an endangered species, some local populations are considered threatened or endangered due to depletion of prey species and habitat loss, pollution by PCBs, captures for marine mammal parks, and conflicts with vessels. In late 2007, the Killer Whales known as the Southern Resident Killer Whales, were placed on the Endangered Species list.

Orangutans
Where they live: Native to Indonesia and Malaysia, they are currently found only in rainforests on the islands of Borneo and Sumatra, though fossils have been found in Java, the Thai-Malay Peninsula, Vietnam and China
Conservation Status: The Sumatran species is critically endangered and the Bornean species of orangutans is endangered according to the IUCN Red List of mammals, and both are listed on Appendix I of CITES. The total number of Bornean orangutans is estimated to be less than 14% of what it was in the recent past (from around 10,000 years ago until the middle of the twentieth century) and this sharp decline has occurred mostly over the past few decades due to human activities and development.

Polar Bear
Other names: Ursus maritimus
Where they live: Native to the Arctic Ocean and its surrounding seas.
Conservation Status: Classed as vulnerable. The polar bear is classified as a vulnerable species, with 5 of the 19 polar bear subpopulations in decline. For decades, unrestricted hunting raised international concern for the future of the species; populations have rebounded after controls and quotas began to take effect. For thousands of years, the polar bear has been a key figure in the material, spiritual, and cultural life of Arctic indigenous peoples, and the hunting of polar bears remains important in their cultures.