The attack

My photo workshop for birds began today in south Texas, and something remarkable happened. My group and I were in a blind photographing crested caracaras who had come in for the food we offered. Out of the blue, a scissor-tailed flycatcher attacked one of the caracaras from above. Flycatchers hate the raptors because the latter will steal eggs from flycatchers' nests. This picture has been significantly cropped, but you can see that the attacker actually landed on the back of the caracara and was pecking the back of its head. I was shooting at 20 frames per second, and I captured 5 frames of this interaction. That means the entire aggressive action took about 1/4 second. My settings were 1/3200, f/7.1, and 2000 ISO, and I used a 100-500mm Canon zoom set to 500mm.