Out of all the deadly critters we have, probably the most commonly feared is the Aussie Magpie. Not even closely related to a European magpie. They don't attack everyone though, only some people. And usually only during nesting season. It's a body language thing. If you try to hide from them you look sneaky, they don't like people wearing hats. If you try to run you look guilty. So cyclists are guaranteed targets. And if you have ever done anything bad to them they never forget your face.
Do a youtube search for Magpie Attacks, some of them are pretty funny. Also search for Wedge Tailed Eagle attacks. In Europe at the moment they're trying to train eagles to attack drones, wedgies do that naturally. They also attack paragliders, sky divers and small aircraft.
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