most deffintly,they will help you "LOCATE" a bird without calling and giving him your location.they will sometimes gobble to an owl or crow befor they will a hen call.the owl call works just before light and at sun rise,then go to a crow.
if you haven't heard a bird gobble and you know there are birds around,just let out with a crow call and listen , move a couple hundred yards and blow again.
the owl works real well just before dark at fly up time.they will answer sometimes after full dark. I have had them gobble to an owl at 10:30 pm.

hope this helps.