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The male eyas was found two days later by plant workers.

With quick wing pumps he shot up and out of sight of Frightful and the eyases.

Just before 8:30 p.m., as the light was fading on Washington Square Park, one of the eyases took flight from the 12th-floor nest at the library.

Jump-flapping is one of the exercises that the young eyas does to prepare for its first flight.

According to viewers of the Hawk Cam, when the eyas stood up at about 6:30 a.m., the bag was gone.