RANAS Y SAPOS
http://www.frogweb.gov/


http://frog.simplenet.com/froggy


http://www.dragonet.es/usuarios/bitxito/reptinet/index.htm


http://macserv.inbio.ac.cr/Expresion/Ale_Herrera/CuadroXI.html


http://www.maui.com/~twright/animals/spanish/frog.htm


http://www.mrtc.org/~twright/animals/spanish/


http://www.encomix.es/~mendivil/natural/fauna/urodelos.htm


http://www.netcom.es/acultura/solar/anfivios.htm


http://www.frogsandtoads.com/index.html