If you just went out and started calling...thats your first mistake. Crows are very very smart. When crow hunting you actually need to camo up and find cover. Is how I like to use a hand call is just hammer on it once and get one to call back... Just start mocking it from then on and it should come on in. Also if you can download a crow frenzy or owl and crow fight, thatll bring em in. Is how I did it was download the sounds to a mp3 or cd player and hook it up to a mini amp (12 bucks at Radio Shack) and plug that into a directional speaker (also around 15 bucks at radio shack) This call can work good for all kinds of diffrent game if you download the right sounds. Good luck with your crows. http://www.huntingfootage.com/showphoto.php?photo=3566&limit=recent
Here is a link of Tembry15 callin some in with a hand call...notice how he mocks them.