Magpies mobing a Squirrel

Observation - Magpies mobing a Squirrel - UK and Ireland. Description: Pair of Magpies mobing a Squirrel which hid and moved along the ground to another tree when the Magpies had another go and then a third. I've seen birds of prey mobed by other birds but not heard of mobing of Squirrels.

Pair of Magpies mobing a Squirrel which hid and moved along the ground to another tree when the Magpies had another go and then a third. I've seen birds of prey mobed by other birds but not heard of mobing of Squirrels.