We developed the BATS tracking system in an interdisciplinary DFG research unit. This innovative 'Wireless Biologging Network' consists of animal-borne mobile nodes ('proximity sensors'), stationary download stations for remote and automated data access, and can be extended by stationary versions of proximity sensors. Animal-borne proximity sensors document associations among individual animals and stationary proximity sensors may be installed at food resources or roosting sites to log individual visitation rates.
Are you interested in using proximity sensors in your research? My colleague Niklas Duda is now making the tech available under the brand 'dulog'. Visit his webpage to get more information or to get in touch. He has been re-designing the tags to make them even smaller and lighter and he can customize the tags to perfectly match the requirements of your project!
left: bare proximity sensor; final weight is ca. 1-2 g including housing and battery; runtimes vary between 1-3 weeks depending on battery size.
right: stationary proximity sensor for monitoring sites of interest. For our research, we place them inside roosts to monitor bat roosting schedules or near flowers to study foraging strategies in nectar-feeding bats.