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Drones (unmanned aerial vehicles, UAVs), are an advanced technology that allows the collection of large amounts of data in a short amount of time, including the detection of cryptic and arboreal animals. Here, we report the first records of the southern maned sloth  Bradypus crinitus  obtained with thermal cameras from a drone. As far as we know, this is the first time a sloth has been observed by a drone. We recorded four individuals of  B. crinitus  in the Brazilian Atlantic Forest, plus first records of  Procyon cancrivorus , which were all resting in the forest canopy. The individuals’ thermal responses demonstrate that the use of drones for research on these species may be a viable option to study still unexplored aspects of their ecology or conservation.

Every flight is a surprise: first records of the southern maned three-toed sloth ( Bradypus crinitus : Bradypodidae) through drones