The emerging discipline denominated -chronoecology of behavior- is the result of the interaction between the work of behavioral ecologists and chronobiologists - those who explain biological rhythms on the basis of experimental studies carried out in the laboratory. Since the beginning of this century, this interaction has generated interest in understanding how biological rhythms behave in organisms living in their natural habitat. This approach requires field studies of rest/activity rhythms in order to obtain detailed hour/hour and day/day information about the possible effects of the...