Virtual zoo icons

Hello, I am looking for a series of 10 unique and original animals icons in PNG & jpeg format, high quality, no copyright. Can be a vector design as in the samples but important to keep similar style and be unique. Be inspired by the sample but don't stick to it. I am open for interesting ideas. Each animal should have a hidden but visible number from 1 to 10.

List of animals:
1. Zebra
2. Hippopotamus
3. Elephant
4. Gorilla
5. Giraffe
6. Lion
7. Tiger
8. Falcon
9. Rhinoceros
10. Camel