But what the American engineer couldn't hear was the roar of chainsaws and noise of the illegal loggers he knew were relentlessly tearing down trees and endangering the gibbons' natural habitat. Not only did his device work, but he says his team found a group of illegal loggers in under 48 hours. Detecting illegal logging has typically relied on aerial surveys or satellites -- which can take days or weeks to alert rangers to tree cover loss -- as well as ranger patrols. Members of the Ka'apor indigenous tribe inspect illegal logging found on their protected land in Brazil. Protecting biodiversityAlongside preventing illegal logging, the NGO is branching out into what is known as "bioacoustics" -- creating a digital library of raw, acoustic data, which it hopes will be used for conservation.

Source: CNN November 27, 2019 10:18 UTC