Night-lit Nellies: Forest Elephant Thermography…
Since 1999, the Elephant Listening Project has been implementing the use of acoustics to study and aid in the conservation of elephants in the rainforests of central Africa. Linked with the Bioacoustics Research Program (BRP) at the Cornell Lab of Ornithology in Ithaca, New York, they have multiple ongoing programs in Gabon, Central African Republic, and Congo. Animals in rainforests present a special challenge for conservationists because they are difficult to monitor. However, if the species uses sound to communicate, acoustic monitoring may be an effective tool for estimating abundance and population trends over time. Luckily for the elephants, they are just such a species. Elephants rely heavily on acoustic communication for their social interactions and to coordinate family movements and so can be heard even when they can’t be seen. Using specialist microphone equipment, the group are able to pick up elephant’s infrasonic calls over large distances and collect data with virtually nil disturbance to the animals.
As if this unique method of data collection wasn’t enough for them, they’ve now added thermography, or thermal imaging, to their research tools arsenal. As many more elephants enter forest clearings by night than by day, the use of thermal images better enables the researchers to link elephant vocal communications with their behaviour during these night time antics. Pretty cool, huh. Or, erm, hot, y’know, depending on the temperature…

