The environmental organization WWF , currently one of the first organizations defending the environment on the planet, turns 50 in 2011. And to celebrate it, in the United Kingdom they have launched a collection of ten postage stamps of the most threatened animal species , among which they include the African elephant, the black rhinoceros and the polar bear. Also featured on the commemorative stamps are the Lycaon , a mammal from Africa with features very similar to those of a dog considered the carnivore with the highest degree of sociability and cooperation, and the Russian Amur leopard , the most threatened feline on the planet. since in order to guarantee the survival of the species, 100 specimens would be necessary and currently there are just over 30.
The Iberian lynx , the mountain gorilla, the red panda, the golden lion tamarin and the Siberian tiger round out the list.
