Howler Monkeys. They're noisy. Like, the noisiest land animals on the planet. Fun fact about this piece: I am bad at scaling up from smaller reference images, and had to start over. So there's actually a lonely eyeball on the back of this page. Even after starting over I still went too fast and managed all kinds of wonky scale issues! I need to slow the heck down. But still. I like how these eyeballs turned out, and the shape of his mouth, even if it's actually bigger in the photo.