Fig. 4
From: A system for automatic recording of social behavior in a free-living wild house mouse population
Intelliscale device (FBI Science GmbH, Germany). A mouse drinks from a water bottle, with its head inside the field of an antenna. It sits on a white, freely movable platform that is connected to a scale in the lower black box. A PIR (infrared motion sensor) is located in the middle of the platform, here partly covered by the mouse