Often these events are precipitated by crows and I would like to take this opportunity to express my gratitude to these birds. They have helped me find owls, hawks and foxes by their raucous calling and scolding.
Red-winged Blackbird attacking a Great Blue Heron with fish
Raven chasing a California Condor
Merlin chasing a Turkey Vulture
Crows chasing a Red-tailed Hawk