Bird louse study shows how evolution sometimes repeats itself – Science Codex
Thursday, August 16th, 2012Bird louse study shows how evolution sometimes repeats itself Science Codex Head lice are rounder than wing lice, for example, and have triangular, grooved heads. The groove helps them cling to a single feather barb so their bird host can't scratch them off. Body lice are plump and will burrow into the downy feathers or drop ... |