Create 2D Animations for unity3d game

Needs good quality 2d animation around 30 of them which will be used in unity3d game - Needs to be small in size to keep the project size small - Need to be in the format which can be easily imported in unity3d project - All animations/art work should have patent/theme Below are some animations we have decided : - Walking/standing animations of below animals : Alligator, bear, dog, elephant, cat, turtle, fox, gorilla, horse, hippopotamus, giraffe, tiger, pig, lion, zebra, frog, penguin, whale(swimming), rhino, kangaroo -Tree growing animation (3 different style of trees) - Flower growing animation we have decided above 24 animation we will decide 6 more so total 30 animations for this project (you might get more work in next project) Please read requirement and put word "Animal" in your bid so i know you went through requirement.