GPS tracks of burrowing owls in La Pampa, Argentina

18 burrowing owls were tagged with GPS-data loggers (Catnip Technologies, USA) on Teflon harnesses as back mounts. The original case of GPS data-loggers was removed, and batteries were replaced by smaller rechargeable ones (100-150 mAh). Loggers were put in a heat-shrink tube for waterproofing. The final size was 25 × 43 × 10 mm and weights ranged between 12.8 and 16.4 g. GPS data-loggers were programmed with two settings: 1) loggers recording a position per minute until battery flat; and 2) loggers recording a position per minute during the night, while switched off during daylight hours (from 11:00 to 20:00 or from 8:00 to 17:00 UTC). Loggers started to log data the night following capture. All data loggers were operative at the moment of recapture or recovery, but two of them failed to provide useful data