Muchas gracias a todos los que amablemente tuvieron la atención de responderme y ofrecerme ayuda! I am fully satisfied and thankfull with those people who gently reply to my enquiry and provided some references. Daniela N. Avido ----- Mensaje reenviado ---- Dear all, I was wondering if you have any references regarding rodents (like atlas, ethology, etc.) or about researchers on this subject. The species I'm concerning are the following, but other references are wellcome: Cavia aperea Ctenomys talarum Ctenomys sp. Holochilus brasilensis Scapteromis sp. Oligozomis sp. Myocastor coypus These migth be unknown species in the North hemisphere (I´m in Argentina, in the Pampean region) but I still wanted to ask, just in case... Thanks in advance, and sorry for any misspelling... Daniela N. Avido __________________________________________________ Correo Yahoo! Espacio para todos tus mensajes, antivirus y antispam ¡gratis! ¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar