# Reconstruction of Jurassic insect acoustics > Live situation record from CLSTR: https://clstr.news/situations/reconstruction-of-jurassic-insect-acoustics > Updated: 2026-08-28T17:09:27.000Z. Sources: 8. Developments: 2. An international research team has reconstructed the acoustic environment of the Middle Jurassic period, approximately 165 million years ago, by analyzing fossilized wings from nine species of ensiferan insects found in the Jiulongshan Formation in Inner Mongolia, China. Using morphological analysis, mechanical simulations, and AI-supported modeling, scientists studied the mechanism of stridulation—where insects rub ridges against a scraper on another wing—to recreate mating calls. The findings reveal a diverse Jurassic soundscape featuring both low-frequency tones and ultrasonic communication. Notably, the research confirms that certain species utilized frequencies reaching up to 20.5 kHz. This discovery indicates that ultrasonic communication existed over 100 million years before the evolution of bats, challenging theories that such communication evolved primarily as a response to bat predation. Researchers suggest the use of narrow-spectrum ‘pure tones’ may have been an adaptation to evade predators, as early Jurassic mammals likely lacked the middle-ear structures required to pinpoint such specific sounds. ## Timeline ### 2026-08-28: Scientists reconstruct Jurassic insect sounds using fossils Scientists have reconstructed the sounds of Jurassic insect species from 165 million years ago using fossilized wings found in China. 3 sources. https://clstr.news/cluster/scientists-reconstruct-jurassic-insect-sounds-using-fossils ### 2026-08-26: Researchers reconstruct insect sounds from 165 million years ago Researchers have reconstructed the sounds of Jurassic insects from 165-million-year-old fossils, discovering that some species used ultrasound long before the evolution of bats. 5 sources. https://clstr.news/cluster/university-of-graz-researchers-reconstruct-jurassic-insect-sounds --- Cite as: Reconstruction of Jurassic insect acoustics. CLSTR, https://clstr.news/situations/reconstruction-of-jurassic-insect-acoustics