First a brown shape dove straight down from the sky, at a blazing speed. It was gone almost instantly. Then I saw a Snowy Egret floundering among a group of Cormorants swimming at the spot where the dive bombing occurred.
Then the Cormorants began fleeing the scene.
Eventually the Snowy Egret managed to fly away and went hiding among the tall grasses of the marshes. Meanwhile, a Peregrine Falcon was perched on top of a nearby pole, watching. I wonder if it was the same one who had dive bombed and scared every bird away. Peregrine Falcons are super fast and capable of reaching 200 mph (320 km/h) on a dive. They are also known to attack mid-sized birds and ducks.