According to World Wildlife Fund (WWF) the following species are endangered.
African Elephant
African Rhinos
Asian Elephant
Amur Leopard
Asian Rhinos
Bonobo
Chimpanzees
Giant Panda
Gorillas
Marine Turtles
Orangutan
Polar Bear
River Dolphins
Tigers
Tree Kangaroos
Whales and Dolphins
Vaquita
Priority Species
Bearded Vulture
Black Spider Monkey
Brown Bear
Eurasian Lynx
Humphead Wrasse
Iberian Lynx
Monarch Butterflies
Penguins
Saola
Spectacled Bear
Tuna
Source : http://www.worldwildlife.org/species/