What ecological implication is suggested by the mule deer's large, mule-like ears?
Superior hearing for detecting predators in open or windy environments
The morphological differences between the two North American deer species reflect specialization for distinct ecological niches. The mule deer possesses notably large ears, which is an adaptation strongly suggesting superior auditory capabilities. This enhanced hearing is particularly advantageous in more open plains or mountainous regions where predators may be sighted from farther away, or where wind conditions might obscure other senses. Effective long-range detection through superior hearing provides a critical antipredator advantage in these exposed environments, contrasting with the whitetail's adaptation for immediate evasion within dense cover.

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The History Of Whitetail Deer - YouTube