Here’s how it works: a new letter of the alphabet is given for each week. Cartoonists and illustrators everywhere are invited to create an animal for that letter, and then post the picture to Twitter using #animalalphabet to share. Simple enough. Here are some of my favorites from the past few weeks:

You can check out the full picture archive at http://animalalphabet.tumblr.com. Anyone wanna tackle the letter ‘Z’ with me? It’s ‘due’ Monday.