During my 35 summers of teaching ornithology at the University of Michigan Biological Station, some 850 students took my field courses and at least 225 of them conducted independent studies of one or more nesting species. My assistants and I, in addition to our teaching responsibilities, devoted countless hours to investigations in the field. From our collective experiences, I am reporting here on the instances when one or more of us actually witnessed a predator either robbing a nest or pursuing a bird with or without success.