What type of animal was Dumbo?

Dumbo is a 1941 American animated fantasy film produced by Walt Disney Productions and released by RKO Radio Pictures. The fourth Disney animated feature film, it is based upon the storyline written by Helen Aberson and Harold Pearl, and illustrated by Helen Durney for the prototype of a novelty toy. The main character is Jumbo Jr., an elephant who is cruelly nicknamed "Dumbo", as in "dumb". He is ridiculed for his big ears, but in fact, he is capable of flying by using his ears as wings.

Source: Wikipedia