Researchers have unveiled the hidden hunting techniques of bats that prey on birds, shedding light on this intriguing predatory behavior. Despite the size and speed differences between the two prey types, new sensor technology has provided valuable insights.
Three bat species have been discovered to consume birds, as evidenced by the presence of avian remains in their feces. However, the specifics of how bats capture birds have long been a mystery due to these disparities.
Biologist Elena Tena and her team from Doñana Biological Station in Spain utilized ultra-light sensors attached to Nyctalus Iasiopterus, the largest bats in Europe, to observe their hunting methods. These greater noctule bats, weighing between 40 to 60 grams and with a wingspan of approximately 45 centimeters, were the focus of the study.
Previous attempts to monitor the bats’ behavior, such as using night vision cameras or military-grade radars, were hindered by the weight of the equipment. However, advancements in sensor miniaturization allowed the researchers to deploy lightweight sensors weighing only four grams. These sensors tracked the bats’ sound, altitude, and acceleration, providing valuable data on their hunting strategies.
This study sheds light on the technological innovations that enable researchers to study elusive natural behaviors, offering a deeper understanding of the complex interactions between species in the wild.
Source: Ars Technica