I am currently working on getting my PhD in theoretical math. My dream has always been to work with animals and help preserve our wildlife. I would like to become a wildlife biologist. I checked some graduate programs in wildlife biology and they do not require for me to have a bachelors in the related field (although of coarse, that helps). I plan on taking some undergraduate (and eventually graduate courses) while in graduate school in order to get the background necessary to be a good candidate for a graduate program in wildlife biology.
I would like to be involved in the graduate program my school has right now, but as a graduate student in a different program I am not sure how to do so. Should I email someone and ask if I can attend their colloquium talks and such?
Is the approach I am taking doable, or am I unlikely to be accepted into a program without a bachelors in biology (or something more related)
Finally, I was planning on taking the undergraduate classes pass/fail. Should I take them for a grade instead?