Every year Peregrine Falcons nest at a cliff of San Diego coastline. Peregrine parents are very protective to their nest. Everything that they perceive as a threat to their nest, they will attack by any means. On this particular day, a Brown Pelican flow near a Falcons' nest, the female Peregrine Falcon immediate laugh an attack. Chasing the Pelican and trying to hold over the pelican's mouth.