Top left to right:
Spoonbill? (some bird anyway), elephant, snake, hedgehog, dolphin, chameleon, budgie, snail, lizard, cockatoo, 'yellow insect', oyster, starfish, fox, sloth, turtle, rabbit, horse, turkey, grasshopper, whale, tiger, bat?, orangutan, peacock, kangaroo, bear.
I make it 27.