I have heard that too but I question if it is true. We all but wiped out wolves in the US so they have a much longer road to recovery. How would we know that wolves do not adapt when they simply do not exist over the vast majority of the US? We wiped out the wolves and we could wipe out the coyotes if we wanted too. I am not say that we should, but that we could and that we can make dent in coyote population if desired. Put a bounty on coyotes and watch the population drop.
Later,
Dan
Think about this, the wolf was removed with nothing more than guns, traps and strychnine and a few good men.
The coyote was there the whole time and he is still here today with no help from anyone.
In the 1950's ,60's and 70's whole armies of men were tasked with eliminating the coyote, men that knew the coyote, they had guns, traps, dogs, strychnine, 1080, airplanes, helicopters, free range, no seasons, year round persecution. Guess what--no joy.
The US Fish and wildlife still employ several good men that hit trouble spots today, no poison, Mainly airplanes and guys on the ground with dogs mopping up the cripples and den hunting with dogs for pups when the planes not flying.
You mentioned bounties, I believe there are still quite a few counties in the US that pay bounties.
But the best money is paid from the fur market, check out the recent wild fur sales in the US and Canada . Add up the numbers sold from that one sale and then ponder how many sales there are scattered across the US and Canada and then ponder that number and then ponder

the number you would have if you multiplied that by say 35 years that's a heck of a lot of coyotes. I have seen 20,000 coyotes at a small auction in Globe AZ. Just about every state has a fur auction once or twice a year. A renewable resource if there ever was one.
After all that the only thing that ever had a regional effect on coyote population was Parvo Distemper and that only lasted about two years back in the 80's.
Adaptable, He is genetically programmed to be just that.
Have fun --J