Corvids are very intelligent and social birds. When danger threatens, they emit a short and harsh call. This is the warning call. It can be heard, for example, when a crow sees a fox. If you remove the small piece of tube, the sound becomes higher.
Crows are not easy to outwit. They have a very strong sense of family, which you can utilise with this game call. The wailing cry of a dying and quietening crow attracts other crows to help the mate. It also works excellently with magpies! The crow death lament is made from local cherry.