Well this is a first for us. (South Burlington). 

Grey Squirrel munching contentedly on a house sparrow. 

The deceased was probably a winter kill or other natural cause, we do not know, but we never see our squirrels predating or lurking in ambush. 
However, a Grey Squirrel page on the web states:
  Squirrels also eat insects, caterpillars, and an occasional clutch of birds' eggs and young birds in the nest. Individuals consume 400- 900 g of food a week. 

But we had never seen it happen.
wag

william gilbert
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