Das Eichelhäher-Männchen lockt ein Vogelweibchen mit den Geräuschen einer Flugabwehrkanone an

I never realized that these Jays were such mimics too. I used to live in an area full of mockingbirds that learned to imitate the old style car alarm sequences of buzzes, chirps and hoots. We had no air defense active in that region cлава Богу

Might attract the American Jay instead