Free images results:

Endanger pictures, stock photos and images


Rhino 3 Royalty Free Stock Photo
Author: Faidoi

Also, here are some commercial RF-licensed images that match your search criteria:  
Endanger Stock Photo
Author: Feel2
Panda Stock Image
Author: Cujochan
Penguin Royalty Free Stock Images
Author: Annemario
Hornbill Stock Image
Author: Mroz