I developed mobile artificial flowers with photoelectric through beam sensor and RFID reading system. The flowers are able to precisely record time and number of bat visits, as well as the identity of RFID tagged individuals. Computational hard- and software is based on Arduino. Each flower has a nectar reservoir that allows a virtually unlimited number of visits. With six rechargeable AA NiMH batteries, a flower runs for up to two nights. Flowers are used in a project investigating whether juveniles forage together with their mothers.
The RFID flowers are readily accepted by free-living bats:
Comparable to the bell-shaped flowers of many bat pollinated plants, the bats have to insert their heads for feeding: