Hey I have a question regarding different cameras

My family and I are going to cancun Mexico this summer . I know it's alot of wild life there and Im confused on which camera would best for the trip. I'm new to the camera world and I really want to make this my hobby after the trip the cameras I am thinking about Canons (rebel t4i,t3i, and x50 hs) Nikon (p510, d3200,d5200). Any input would be helpful.