"Jose" wrote in message news:XC1Lg.20846

Observable behavior, and an explanation offered some years ago by a game
warden in response to essentially the same question.

......Nothing in their observable behavior indicates an inability to
"reconcile" (whatever that means) another creature moving at 45-60 mph.

.....other than the apparent inability to judge speed and/or closure rate on
vehicles moving at those speeds. Or perhaps many deer just have poor vision
across the board. I don't know. But I have observed, and asked, and
received what seemed a plausible explanation from a person who had studied
wildlife, so I accept that until confirmed information comes my way. Do you
have any of that confirmed information, Jose? If not, then you're no
better off than I am, are you?