Here are some line drawings for your inspiration
Day 1. Butterfly – Leaf
2. Elephant – Lion
Day 3 Kangaroo Antelope
5. Orca – Bat
7. Polar Bear – Snow Leopard
9. Blue Dragon Mollusk – Frog
Day 11. Elephant Tree
Day 12. Pengolin – King Penguin
Day 14. Flamingo Hibiscus flower
Day 15. Dragon Leaf
16. Arctic Wolf – Caribou / Reindeer
20. Ladybug – Hippo
26. Crocodile – Octopus
30. Bear – Chipmunk
31. Clouded Leopard – Moth