Thermal responses of a winter active and nocturnal beetle

[Description of methods used for collection/generation of data] Field data showing the number of collected specimens in five pitfall traps, as well as those observed in 400 m transects directed to count the number of active individuals at different time periods, and also counting the number of vertical galleries in the ground made by the species. A thermocamera and K-type thermocouples, were used to estimate the external temperatures of the body of several specimens, ans also the gropund and air temperature. Thse field measurements were complemented with laboratory studies directed to measure by a thermocamnera the external temperature of specimens subjected both to a constant air temperature (4-5ºC), and to a progressive decrease in air temperature from 15ºC to -14ºC. Finally, a spectrophotometric analysis was carried out on the external side of the left elytra of ten specimens, measuring light reflectance, transmittance and absorbance across the 200-1600 nm wavelenght spectrum at 5-nm intervals. The internal side of each elytron were also measured but only in the near-infrared range (NIR).