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Old Tuesday 29th October 2019, 12:26   #3
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Join Date: Dec 2005
Location: Cornwall
Posts: 12,497
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A lot of passerines have similar 'predator alert' calls and strength in numbers cuts across the species barriers - a sole bird of one species can latch onto a group of another.

In the UK Little Egret can follow eg shallow swimming Cormorant to pick up disturbed prey.
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