While most animals are adorable, not all are the same. In fact, we separate animals into categories, such as mammals, birds, reptiles, and more! There are important aspects to how we categorize animals, and this cute science worksheet will help little learners tell the difference between birds and mammals. Simply read through the clues listed down the page and think carefully about each. Does it describe a bird or a mammal? Check the box next to the correct cuddly creature to complete!