Courtesy of Zootles Butterflies, we’ve got some trivia for you so you’ll be ready to dazzle the masses at your next children’s birthday party!

The smallest butterfly in the world is about the size of your thumbnail–but the biggest? That award goes to the Queen Alexandra birdwing, which is about 11 inches across. And you may be aware that some butterflies have fake “eyes” on their wings to confuse predators, but did you know that some of them deter predators by having a nasty odor? There are even some chrysalises that look like bird droppings, which helps them avoid getting eaten.

Butterflies are able to see UV rays, which humans cannot. Many flowers have patterns on them that work like little signs pointing the way to nectar–but the patterns can only be seen by eyes capable of discerning ultraviolet (UV) light.

Here are some ways to teach a child about the differences between moths and butterflies: If it’s daytime, you’re probably looking at a butterfly, because moths are more often active at night. Moths have plump, fuzzy bodies, while butterfly bodies are more smooth. Butterfly antennae are thin, with round clubs on the tips; moth antennae are usually more feathery.

There are plenty more butterfly facts that you will find intriguing in Zootles Butterflies–from the workings of a proboscis to the construction of scales. You may never look at one of these small fluttering creatures quite the same way again!