Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Boulengerina - Boulengerina is a genus of elapid snakes known commonly as water cobras so named because of their semi-aquatic nature. The genus was recognised to have two species which are found in central and southern Africa.
The answer to this question is:
Animal