Top most endangered mammal species

The issue of tiger conservation made me wonder what mammals are really in trouble. This probably isn't all of them, but it's definitely some of them.

Polar Bear and Pacific Walrus -- good numbers now, but endangered by loss of sea ice in the Arctic

Tigers -- 3,200? (Siberian tiger -- 450)

Javan Rhinoceros -- 60?

Giant Panda -- 1,600-2,500?

Mountain Gorilla -- 720?

Northern Right Whale -- 300-350

Black Rhino -- 3-4,000

Sumatran Orangutan -- 7,000+

Small cats, such as the Amur Leopard (40), Florida Panther (100), Iberian Lynx (200?)

Black-footed Ferret -- 1000+, numbers increasing

Indus River freshwater dolphin -- 1,200 maximum

(note, when I wrote the linked article on the Indus River dolphin, I didn't realize how well the black-footed ferret was doing