Camera for Research Work

Hi, I'm a graduate student (BSc. sp. in Zoology) in University of Peradeniya, Sri Lanka and I'm working with a group of field biologists. We are engaged in threatened species conservation project. No funds, no permits and no help from authorities, but, we got what we want the most. We have a small group of people that dedicated their lives into this. Good camera is one of the most important thing for a field worker. Without having high quality images, we can do nothing. So, if you can, please help me to buy a good camera for this research project. Then we'll be able to continue what we love.......