Winter acoustic activity of Nyctalus noctula in Wroclaw, Poland

The data set presents a table of acoustic activity levels (number of sequences of each type of echolocation during 5-second period) of Nyctalus noctula bat during the winter 2011/2012 in the urban roosts in Wroclaw, Poland. The table contains 9 columns that correspond to 9 variables: T_roost - temperature inside the roost (in the degree Celsius); T_a - the ambient temperature outside the roost (in the degree Celsius); C-activity - activity inside the roost; P-activity - activity outside the roost; data_time_UTC - date and time of registration; hours_rad - time of the day in radians; cos1 - cosine of time; sin1 - sine of time; Time_rel - time realisation continuous vector numbering consequently each registration form the beginning to the end of the sampling period.