http://bowsite.com/bowsite/features/articles/deer/seminars/coyotes/

Where deer densities are too high and hunting pressure light, the coyotes are actually doing the deer herd a favor by taking out a few deer. On the other hand, where we have deer populations less than 10 deer per square mile, coyotes may have a negative impact.

I will find the other read in a bit. I need to get something done first here.