Roe deer fawns are left lying still in vegetation by their mothers for hours at a time. Well-meaning human intervention when fawns are found alone is a leading cause of unnecessary fawn deaths.
The instinct to rescue a lone fawn is understandable but nearly always harmful. Fawns imprinted on humans cannot be successfully reintroduced and typically die in captivity or after release. The most significant preventable welfare threat is agricultural machinery — farmers should walk fields before cutting.