Eastern North America, except southern Florida, north to Nova Scotia, New Brunswick, southern Quebec, and southern Ontario (Canada), west to the central plains and south to Hidalgo, Puebla, and adjacent Veracruz (Mexico); introduced on Cuba, Isla de Juventud (= Isla de Pinos), Puerto Rico, Hispaniola, and Jamaica in the Antilles; introduced widely in the rest of the world including the Netherlands, Bordeaux region of France, Belgium, northern Italy, western Spain, Crete, Malaya (Malaysia), Java, Bali, Japan, southern and western Mexico, northern Thailand, Korea, and Taiwan (China)
J. Goraya et al. / Biochemical and Biophysical Research Communications 250 (1998) 589-592. Ranatuerins: antimicrobial peptides isolated from the skin of the American bullfrog, Rana catesbeiana