444, a call can wake up a predator and bring him in, but in general all wild animals move around more at night than during the day.
As far as "crack of dawn", for deer hunting it's a case of Big Bambi not having yet gone to bed. Of course, during active rut there's no telling what time of day BB is gonna be out there running around like a high school kid on Satiddy night.
Since I hate getting up early, I prefer walking hunting, kicking BB out of bed to see if he's worth shooting.
, Art