Engage your students for by showing Mike Rowe's Dirty Jobs: Avian Vomitologist with handout!
My students always get a kick out of this video! They like to see where owl pellets are collected and that studying bird vomit is a real job. This activity prepares students with some background knowledge and helps the squeamish students feel more comfortable (the sanitation process is shown). Watch from 16:10 to 27:42.