the young coyote is far from dumb but every thing is a learning experience for them.he may have never heard crows fighting like that before and was curious.he also no dought figured he could grab dinner when the loser of that fight hit the ground.coyotes(young and old)will responed to any fighting tape,weather it be foxes fighting,crows,cats or just about anything except maybe coons.they generaly don't feed on coons.but if its winter and there hungry enough even coon squalles may bring them in.crows can somtimes be a dead giveaway to an approaching predator.they will fly over the predator following him where ever he goes.not realy sure why,it might be they figure they can pick what ever is left when the predator makes a kill.maybe its to warn every critter in the woods of pending danger.who knows who cares,what ever it is its worked for me several times.