Did you know this?

My first card from the "Did you know?" series. I saw a lot of this cards in Canadian users' profiles, so I think it's pretty popular postcards. And a very good idea - to write something interesting about animals/places of your country right on the "face" of the postcard. Thanks, Rose!
You may not see so I'll write here: "A sea lion is any of several marine mammats of the family Otariidae. Sea lions are characterized by the presence of external ear pinnae or flaps, long front flippers, and the ability to walk on four flippers on land. Sea lions are often a popular attraction at zoos and aquariums, performing tricks such as throwing and catching balls on their noses and clapping. Sea lions of many species have seen a severe and rapid decrease in numbers in recent years. Many factors including overfishing of other species, shooting by fishermen and pollution have probably contributed to the decline"