Crows wander from family unit when temperatures drop

Part of the 'Poughkeepsie roost' photographed from Rinaldi Boulevard in the City of the Poughkeepsie. Crows roost in communal groups in cities for a variety of reasons, including safety in numbers and the fact cities are warmer. / Darryl Bautista/Poughkeepsie Journal file

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 This is an article written by Dr. Doug Robinson, a member of the Crow Research Group.