Wildlife biologists are scientists who observe the behaviors of plants and animals, and also work to save and reserve them. Their studies help them decide how the flora and fauna help the ecosystem and what their roles are. Often they will perform experience to expand knowledge and understanding of these organisms. Most biologists specialize in a certain area; Entomology, Ornithology, Marine Biology, or Limnology.
Most people who work as a biologist work in zoos, parks, reserves, and labs. Study.com says "In order to become a wildlife biologist, you must have a Bachelor's degree in wildlife biology for entry-level jobs. A Master's degree or Ph.D. is required for upper-level positions."
In my opinion, I feel wildlife biology is more for people who wish to work directly with the animals and plants. Though wildlife biologists choose to work with the animals.