John Cancalosi / American toad (Bufo americanus) males attempting to mate with female, New York, May

John Cancalosi / Southern round gland toad (Incilius / Bufo coccifer) pair in amplexus, Costa Rica, September

John Cancalosi / Southern round gland toad (Incilius / Bufo coccifer) pair in amplexus, Costa Rica, September

John Cancalosi / Iberian green / Western marsh frogs (Rana perzi) mating pair in amplexus, Spain

Bernard Castelein / Male Common Frog (Rana temporaria) (above) mating with female Common Toad (Bufo bufo) Belgium

John Cancalosi / Couch's Spadefoot toads (Scaphiopus couchii) mating pair, Arizona, USA

John Cancalosi / Couch's Spadefoot toads (Scaphiopus couchii) mating pair, Arizona, USA

John Cancalosi / Couch's Spadefoot toads (Scaphiopus couchii) males fighting over female during mating season, Arizona, USA

Jose Luis GOMEZ de FRANCISCO / Natterjack toads (Bufo calamita) in water mating, Spain

Jose Luis GOMEZ de FRANCISCO / Natterjack toads (Bufo calamita) mating, Spain

Jose Luis GOMEZ de FRANCISCO / Natterjack toad (Bufo calamita) calling, Spain

Jose Luis GOMEZ de FRANCISCO / Natterjack toad (Bufo calamita) calling, Spain