Here is the information on becoming a certified wildlife biologist
http://wildlife.org/learn/professional-development-certification/certification-programs/
http://wildlife.org/wp-content/uploads/2014/05/AWB-Certification-November-2016-restricted.pdf the application
Some colleges specifically state whether or not their major will result in this. Otherwise you can fulfill the requirements on you own.
What state are you in? Your flagship university probably has a good program.
My vet was a natural resources and forestry major from http://www.uwsp.edu/cnr/Pages/default.aspx At the time he was graduating the forestry majors were being hired by the paper companies. I don’t know if that holds true today.
My kid was looking at U of Minnesota Twin Cities depart of Natural Resources https://www.cfans.umn.edu/academics/majors-minors/fisheries-wildlife , U of WI- Madison http://forestandwildlifeecology.wisc.edu, Juniata College http://www.juniata.edu/academics/departments/environmental/areas-of-study/wildlife-conservation.php, University of Maine https://nsfa.umaine.edu, Michigan State http://www.canr.msu.edu/undergraduate/undergraduate_majors_specializations/, SUNY ESF http://www.esf.edu, and she ended up at a liberal arts college that has a conservation track in the biology department.
Here is an older thread on CC that I had bookmarked at the time. http://talk.collegeconfidential.com/college-search-selection/1099009-what-best-undergrad-ecology-wildlife-program-me.html
On the Internships forum I listed opportunities that I have found http://talk.collegeconfidential.com/internships-careers-employment/1957208-natural-resources-environmental-science-internships.html#latest
Do you do any volunteer work connected to the field already? My kid volunteered at a wildlife rehabilitation center. The work was interesting in and of itself but she also got to talk to the college interns and get ideas for her education.
In my opinion, hand on experience and internships will be important as you progress through college. Consider taking a year or semester off in order to rack up the hours and experience.