What is a zoologist? A zoologist is a scientist that studies the many animals found around the world and how they survive in the wild. Within this field, scientists work hard to study all animals from the largest mammals, blue whales, to the smallest insects, such as fairy flies. Explore the tools and skills needed to become a zoologist and find out what scientists are doing to help animals. Readers will even find out how to protect the hundreds of endangered species fighting for survival!.