A quick rule of thumb is that you can eat anything on land with fur or feathers, as long as it is properly prepared and cooked thoroughly to kill bacteria and other pathogens that would make us sick. That means mammals and birds are good to go, although palatability is never guaranteed.
Earlier this year, while teaching survival school, my classes and I ate two possums from my property. Both were fresh and slow-roasted over the open fire. The first possum tasted delicious. Had I been blindfolded, I would have sworn that it was pulled pork barbeque. The second possum, however, sucker-punched me in the mouth. I was all ready for more possum barbeque, but this one tasted like he had been cooked in a burning plastic garbage can. Not nice.