Yes, animals pick their noses—as indicated in this video from National Geographic — but there’s more to it than being a gross habit. A normal mammalian behavior, nose-picking helps clear the sinuses and improve breathing. While monkeys use their fingers or tools such as sticks, other animals — those without the luxury of fingers — use their tongues, or simply take a deep breath and blow, proving that mucus is just one more element that connects humans to the animal kingdom.

https://youtu.be/kcxvtdvW-wI

Check out some more weird animal behavior here!