well, if I fell from a low flying airplane and landed in one piece in a spruce forest , or my chute got blown off course .. and I had nothing at all,, I think I would first make a spear,,, then a some cordage for a snare,, set the snare and go try to spear fish,
and eventually, some rainy evening., after dinner , sit by the fire and work on an expedient bow,,
never shot a critter with them , but we did make them as kids and they would , some of them launch a homemade shaft at about 1/2 the speed and power of our cheap Kids 20 or 25# Ben Pearson glass bows,, accuracy was paper plate at 8-10 yards.--Not good enuff for a Bouncing Bunny Bustin out of Brushy Bushes
other than as a leisure time activity after the shelter, fire and a few days vittles were obtained,, tho,, making the bow would be on the back burner..maybe a good project when snowed in,,
just too time and energy consuming vs foraging,, I think the kill ratio would be poor,, not due lack of power,, but due lack of accuracy,
but the BIG waste of time and especially energy comes in when you spent 1/2 day stalking close enough for a shot and the bow fails,, or its noise spooks the game,, or you simply miss..
Bush Made Bow i em aach oh... falls in the category of Betterin Nuthin,, but a spear imho.. would be about as good,prolly better and take nearly no time-- neither would a deadfall to bop a Bunny like Peter Cotton Tail Hoppin down the Bunny Trail..