What's the difference?
It's a big world out there, and with such an abundance of life it's no surprise that things can get perplexing, especially when it comes to animals. Sometimes similar creatures from the same order get categorized differently because of habitat or behavior. Other times animals from completely different species evolve in similar ways. Whatever the reasons, at times it's hard to know the difference between them. Here are our favorite pairs of confoundingly confusing critters and how to tell the difference.(Text: Melissa Breyer)