Well, this is a hard part...Let me fill it this russian joke:

In the tundra lives a small tribe called chukchas. One man of these people went to some kind of zoo and after he came back his people start asking him about the animals he saw. Well, said the traveller, i saw a zebra! "what is zebra?" ask the other chukchas. "you know what is reindeer, arent u?! this is the same but with stripes." Ahaaa, told the others and whar else did u see? "i saw a lion!" told them the guy. "what is lion" asked the others. "u know what is reindeer, arent u?! it's like it but with crest."Ahaaa, said the others and what else? "hm, a saw an aligator." "ohhh very good! "said the chukchas and what is aligator. "hm, said the guy, u've seen an reindeer, arent u?! well, this has nothing to do with it":)))