Ditto on the 6 in 1 whistle, but never had much use for a call.. A couple of deeks in timber hole and they are either going to drop in or not.. The key to locating them is to find water that has acorns in it.. Then just stand by the tree and wait. .They will dip in at first light.. Better be quick on your feet cause them little boogers are hard to hit.. But they sure taste good.