The entire premise of the episode relied on the fact that people didn’t know that Turkeys could fly. Although they might struggle if they’re already deceased or don’t like being tossed out of a helicopter.
Wild turkeys, provided they arent injured, fly very well. A dropped wild turkey would parachute down to a tree or roof peak.
A juvenile domestic turkey, if its one of the heritage breeds close to wild ones, can sometimes do sort of a wing assisted jump up into a tree or fence top.
A full grown adult domestic turkey cant fly. Not a little, not even more than a hop that just gets all their toes up simultaneously.
Assuming Les is dropping fully grown domestic turkeys they would tumble and flap but still hit the pavement like wet bags of cement. Not strong enough, no longer aerodynamic, wings too small for that weight. Splat.