Radio tracking 19/05 - 30/05

Bat tracking often relies on specialized devices such as the Yagi and the Lotek Biotracker. The Yagi includes an antenna that can be detached and used like a metal detector to help locate lost tags. These tracking devices emit signals that allow researchers to monitor bat movements and behaviour. However, over time, the transmitter’s battery may degrade.

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To begin tracking, it's best to start from a high point, as this improves signal reception. Triangulation is a key method used to determine the bat’s location. A sudden change in the volume or direction of the signal often indicates that a bat has left its roost. In some cases, if a bat becomes panicked after tagging, it may immediately fly to an emergency roost.

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Certain bat species, such as the Brown Long-Eared (BLE) and Noctule, are known to travel long distances and may not return to the same roost each night. BLE bats often feed in trees, and this behaviour can sometimes lead to the tracking tag being scraped off by branches.

Maternity roosts are typically used by female bats and may contain live young. These roosts are crucial for breeding and raising pups and can provide important data during tracking studies.

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WC 19th - Species encountered - MN NN BL BB - all radio tracking

WC 26th -  Species encountered - MD MN NN BB BL NL - radio tracking, Emergence survey conducted on NN over 2 nights 

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