It plays a recording of a cry the birds use to warn each other that danger – a cat, a hawk or even a human – is lurking nearby. Dr Tsukahara estimates that he recorded 10,000 crow calls before ...

If a flock of crows comes and sits in your house and fights among themselves, it is considered a danger to the householder.

When one crow is in danger or feels threatened, it will call out to others for help. Which is why if you upset one crow, don’t be surprised if a whole gang of crows starts harassing you.

Hear Trent Hentschel on the next episode of the new afc.com.au radio podcast Crow Call, available on Tuesday. Listen in by clicking on the Crow Call qualifying final link on the home page or go to the ...