Here in western Montana, coyotes kill a few fawns, but Imidacloprid kills both the adults and a lot of fawns each year. In 2015 our neighbor, while mowing 800 acres of hay, found 49 dead fawns that were lying curled up dead in the tall foliage. They had not been touched by coyotes or other scavengers. They had died soon after being born. Dead fawns that I have found curled up dead have birth defects and always a fairly severe underbite. The neighbor also killed 8 fawns with his swather. That totaled 57 fawns killed by humans, 0 fawns killed by coyotes. So are you certain that the coyotes are the ones killing the fawns where you are. Imidacloprid falls in the rain and snow onto foliage eaten by the deer throughout North America. A study published in Nature (Berheim et al. 2019) showed that Imidacloprid exposure killed both adult does and fawns and caused birth defects (especially underdeveloped facial bones causing underbite or overbite) on the fawns. Right after Imidacloprid began being used in large quantities on fields in the U.S. and Canada, a Canadian veterinarian published several studies about horse foals with underbite and other birth defects. The foals had the same birth defects that the grazing animals here began being born with right after Imidacloprid began being used upwind of western Montana. A veterinarian in Mexico wrote a book about underbite on beef cattle there that began being born with underbite in the same time period. Imidacloprid kills millions of calves (and fawns) in the U.S., and causes millions of dollars in losses due to less weight gain on beef calves that are born with underbite but survive to be sold. For some reason, no one cares about that. Not even mentioned! Only the few hundred total animals that the coyotes and wolves kill are ever mentioned. Weird!