Dear Patil

There are various courses and experience required inorder to be a wildlife photographer and for that you need to visit the link which is given below as well there are top two organisations are there which are good in this are like Nat Geo and BBC so based upon that you can be able to get the chance to work there.

https://study.com/articles/How_to_Become_a_Certified_Wildlife_Biologist.html

All the best