The 306th prohibition is that we are forbidden from taking the entire bird's nest — the mother and the chicks — when hunting.1

The source of this prohibition is G‑d's statement,2 "You must not take the mother along with her young." This prohibition has a remedial positive commandment,3 "You must first chase away the mother." If one can no longer send her away and thereby fulfill the positive commandment — e.g. if the mother died before she could be sent away — the punishment is lashes.

The details of this mitzvah are explained in the end of tractate Chulin.4