Would it be possible to double major in biology and zoology?

Is it even worth it? My goal is to becoem a wildlife biologist. And i like the idea of being able to hone in a little more on the wildlife i want to specialize in (hyenas) and I know i may have to get my graduates in zoology. It's just that i hear biology helps a lot in the field that i am looking. So i am wondering if it is possible due to the idea that perhaps these majors have overlapping courses depending on the university? And how long one thinks it may take me, more or about the same as if i was just getting one major? I am seventeen and am running into a lot of dead ends or end up with more questions. I look forward to hearing your answers