Seagull Ritual
Over the past several weeks, flocks of seagulls have encircled the skies over Fremont to create “funnels” that rise hundreds of feet in the air. They spiral around these funnels for no apparent reason. It can’t be because of sources of food on the ground below because these funnels tend to drift and not stay put. Once in a while a new flock will fly from afar to join this mass of birds in the sky. Searching the net on this behavior has turned up nothing.
Here’s a worm’s eye view video (avi, 2.3MB) of the phenomenon.