Eyes on the admirable cooperation of crows

Early one morning this week, just as the sun was coming up, I walked out onto the front porch with my coffee.

There was a flutter of wings rising into the air from the snowball bush near the porch, where one of the feeders hangs.

I saw two chickadees taking to the air and a cardinal with his wife. From the very top of the large pine tree near the blueberries came the cry of a crow. He cawed and was answered by another crow, perched atop the red maple near the mailbox. First one, then the other called back and forth.

Clearly, they were communicating

The flock who were feeding in the grass of the front yard near the crepe myrtles took flight.

I had heard that crows have sentinels whose job is to perch high and

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