On cold, dark winter mornings, small black crows known as jackdaws can be heard calling loudly to one another from their winter roosting spots in the U.K. before taking off simultaneously right around ...
Jackdaws use a "democratic" process to decide when to leave their roosts en masse, new research shows. In winter, jackdaws roost in groups of hundreds or even thousands, and it is common for most or ...
Jackdaws recognize each other's voices and respond in greater numbers to warnings from familiar birds than strangers, new research shows. Jackdaws recognise each other's voices and respond in greater ...
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