Reintroduced gibbons in Southern Sumatra and Java disappear into dense rainforest canopy the moment they're released - but their calls travel for miles.
Released gibbons are almost impossible to track visually, and biodiversity within the reintroduction sites has never been systematically measured.
Solar-powered forest recorders paired with AI-driven voiceprint mapping (SonicDNA) - filtering noise, matching calls to individuals, and confirming location without ever recapturing an animal.
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