Crepuscular means: Becoming active at twilight or before sunrise, as do bats and certain insects and birds. Since first becoming owned by ferrets, many books and sites describe them as being crepuscular. I'd like to know from where this information first came. If anyone can help me in my research, I would truly appreciate it. My ferrets are certainly not crepuscular which is what led me to look further. I would describe my ferrets as being mainly nocturnal with a fair bit of daytime activity. I found these 2 sites by the same author which describe polecats as being mainly nocturnal with some daylight activity, depending on the availability of prey, weather etc. <http://ead.univ-angers.fr/~ecologie/Polecat_project.html#_LODE_T._1999_2> [The links from the above page to the abstracts seem to be incorrect. For example, one link points to http://sciences.univ-angers.fr/ecologie/Swimlut.html but probably should be to http://ead.univ-angers.fr/~ecologie/Swimlut.html BIG] <http://ead.univ-angers.fr/~ecologie/Pub_PDF/Time%20Budget%20BehavProc99.pdf> There are other sites that say the same, but these are well resourced. This could show more clearly the need of ferrets to be exposed to natural daylight/sunshine on a regular basis. Input welcome. :-) Shirley [Posted in FML 5544]