Thanks to the data provided by citizen scientists, the researchers were able show that the diversity of bird beaks expanded early in the group's evolutionary history, around the time other dinosaurs died out. (nhm.ac.uk)
I've never thought of using an emery board for sanding... not a bad idea, especially for smaller projects like bird beaks. (exquisitelyunremarkable.com)
Is he eating a live bird beak - first in this picture? (sbnation.com)