I would have to say the Iberian Lynx as it has faced extinction repeatedly.
Additional Information: The Iberian Lynx is listed by the International Union of Conservation for Nature, or the IUCN Red List with a status of "critically endangered", and the population trend posted as "decreasing". They are also protected by the Convention of International Trade in Endangered Species, or CITES. Some consider the Iberian Lynx as part of the "big cat" group even though they are not really large. There are many small cats in circumstances as dire as the Iberian Lynx, but there is not a specific cat that has been chosen formally as the most endangered by the IUCN Red List or the US FWS Endangered Species List. For more details, please see the sites listed below.
I'm not sure if any cat BREED is endangered (although Havana brown's are considered the rarest). The rarest cat species in the world is the critically endangered Amur Leopard.
They used to be so endangered that they were declared extinct in the 1950s, after the introduction of the Persian in America. But the Central Maine Cat Club was formed to protect the Coons in the 1950s and now, it's the second most popular cat breed in the world! Sources: Wikipedia
Siamese or Persians are probably the most famous cat breed.
Persians are the most popular cat breed, but most cats owned are mongrels (mixed breed).
The most famous breed of hairless cat is the Sphinx.
The most popular breed is probably the Moggy which is just a normal cat with no particular breed.
Probably the Maine Coon because they are the largest cat breed. =)
The most popular cat breed is a Persian.
The most popular pedigree breed of cat is the Persian, but the Domestic Shorthair (otherwise known as the Moggy or mixed breed) is much more popular.
Though Tigers are an endangered species, they are not the most endangered species of wild cat. The Amur Leopard of far eastern Europe, is the most endangered. With the announcement that there are only 25-35 left in the wild, the World Wildlife Fund along with the Wildlife Conservation Society, are trying desperately to save them.
There is no way to tell just by the colors what breed that cat might be. It is most likely mixed breed, though.
The most popular cat breed right now is the Persian.
The Siberian husky is not endangered. The breed was the 14th most popular breed in the United States in 2013, according to registration statistics released by the American Kennel Club.