Animals that are often Confused for Another 

Rabbit/Hare Hares have longer hind legs than do rabbits

Frog/Toad Toads fall in the category of frogs yet they are different from them 

Crow/Raven Ravens and crows are different birds, yet closely related

Seal/Sea Lion The main difference between the marine mammals we call seals and those we call sea lions is size

Butterfly/Moth We tend to use the word butterfly for lepidopterans that are chiefly active during the daytime

Bee/Wasp Wasps—also hymenopterans—in most cases differ from bees

Llama/Alpaca The case of llama/alpaca is one in which people sometimes use a broader term

Alligator/Crocodile Crocodilians—a group of reptiles that includes crocodiles and alligators

Insect/Bug The word insect refers to all creatures belonging to a class of arthropods