Sunday, September 06, 2009
Dilemma of the Day: picking a crushed nut on a busy road
From the NS review of Crow Planet:
A Japanese study of urban crows found that the birds dropped hard-shelled nuts in the road at traffic intersections for cars to roll over and crack. When the traffic was heavy, the crows waited for the walk signal before grabbing their snacks from the street. How can you not admire that?