First off I want to make one thing very clear.
DEAD COYOTES EAT NO DEER.
Live coyotes however will most certainly kill and eat deer. Not just fawns either. I have seen firsthand evidence of them killing adult deer. I've also heard plenty of eye witness testimony telling of adult deer being killed. There is no question about it.
In the last few weeks I've been doing some ADC work for a couple of high fenced deer ranches (1000 acres each). They have been very effective with snares/traps but both places had a pair inside the fence that the trapper couldn't get. They rejected his best efforts. I called in and killed both pair. It took three days each on both places to make them dead. I didn't use the conventional run and gun methods either as I knew ahead of time they were probably an older smarter pair that would not be pushovers.
By the way the fawns haven't begun to drop but the does are very heavy bred. These coyotes have killed a couple of these heavy does just before I was called on one place.
On the other place has been high fenced for I think 6 years. The first 2 they had no predator program. As a result they lost almost the entire fawn crop to predation. Yep that is right, they had practically no bucks available for sale or harvest in those age classes. Since they began a predator program their survivability rate has skyrocketed.
Even though I’ve killed the offending pairs on both places my job is not done. As the fawns begin to drop, this will draw more coyotes. The fence is very effective at keeping deer in but it will not keep coyotes out. Even with predator wire turned under they will dig or climb in. I will go back when they begin to drop and hopefully we help the fawns get a few weeks old. Then they will stand a lot better chance against predation.
As far as mature buck being killed by deer….This happens too. In places where bucks rut hard they become very stressed and this makes them vulnerable. In heavy snow….same thing…… coyotes learn to work with a team effort to take these larger animals. This is well documented.
Be aware however that every dead deer that coyotes eat was not necessarily killed by coyotes. They will sometimes die from other injury just to be eaten by coyotes.
pair from last week. Don't they look peaceful?
By the way they will and do kill calves too.
Good Hunting, and God Bless,
Byron