Status, vocalization and breeding biology of two species of African bullfrogs (Ranidae: Pyxicephalus)



There is much confusion concerning the identity of bullfrogs in southern Africa. Currently three subspecies are recognized, and introgression has been suspected. We demonstrate that in southern Africa there are two species: Pyxicephalus adspersus which has a long call, breeds during the day, and exhibits lek behaviour; Pyxicephalus edulis which is smaller, has a short call, breeds at night and does not exhibit lek behaviour.