In Brooklyn Park, a Fierce New Pecking Order

A two-ounce menace is terrorizing Greenpoint, Brooklyn.

On Arthur Henry’s inaugural stroll through the recently opened Transmitter Park along the waterfront on a piercingly bright afternoon last week, he felt a slight tap on his head.

He reached up, touched blood, and then saw a mockingbird circling above.

Mr. Henry ran.

Two days later, on his next visit to…