Lutzbug(18+) - The creator of webcomic "Krazy Noodle Massacre", Lutzbug has an intriguing cartooning style of guts and psychedelic imagery. Also bird pics!
Animal Photo Reference Repository - Good, REAL animal reference!
YoshiArt - A classic old site about Yoshi! My first web experience was looking at all the manga and the Super Mario cartoons there.