Mule deer appeared to be more bold and would band together and fight back. While studying these predator-prey interactions, Lingle also noticed mule deer would sometimes help orphaned white-tailed fawns crying out in distress. Mule deer will rush in to protect orphaned and distressed white-tailed deer fawns, but the adult white-tailed deer don't seem as interested in returning the favour. Mule deer babies cry in a higher pitch than white-tailed deer, which gave her a wild idea. Lingle's research team toyed with the pitch of recorded mule deer cries, lowering it to the same range as white-tailed deer.

Source: CBC News October 12, 2020 09:00 UTC