NEW DELHI: China showcased a miniature, insect-like drone designed for covert surveillance missions, drawing global attention and concern over its potential military and espionage uses. Developed by the National University of Defense Technology (NUDT), the drone is just 1.3 cm long and weighs less than 0.3 grams. It was unveiled on the Chinese military broadcaster CCTV-7 as part of an exhibit on next-generation robotic systems.In a demonstration aired over the weekend, NUDT student researcher Liang Hexiang held up the ultra-light robot and said, “Here in my hand is a mosquito-like type of robot. Miniature bionic robots like this one are especially suited to information reconnaissance and special missions on the battlefield.”The drone, resembling a real mosquito, is equipped with two leaf-shaped wings, a slender black body, and three fine wire-like legs. It can reportedly operate silently and without radar detection, carrying ultra-miniature cameras and microphones to capture images, sounds, and electronic signals. Its small size makes it ideal for indoor surveillance, even inside secure government or military facilities.
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According to The Defense Post, the device’s compact build enables it to evade conventional detection systems and operate in confined spaces — a feature that has raised alarms among privacy advocates and military analysts. Experts warn that such drones could be exploited for espionage, cyber intrusions, or even biological warfare.“This could mean greater access to restricted areas such as secure government facilities,” noted Sam Bresnick, a research fellow at Georgetown University’s Centre for Security and Emerging Technology. “If China is able to produce mosquito-sized drones, it would likely be interested in using them for various intelligence, surveillance, and reconnaissance tasks, especially in places that larger drones struggle to access, such as indoor areas. These drones could be used to track individuals or listen in on conversations.”Other experts are raising more dystopian concerns. Tracey Follows, a futurist and former Google advisor, told The Sun that such drones could be used for “untraceable murders” or carry pathogens, referencing a Black Mirror episode in which robotic insects were weaponised for targeted killings. “In time, one expects a drone to have the situational awareness to carry out an attack autonomously without a human in the loop,” she said. “The big question is what’s the payload on these drones, what are you actually attaching to the drone?”The mosquito-sized UAV is part of a broader NUDT programme exploring micro-robotics, with parallel developments including artillery-launched drones that can survive the extreme conditions of being fired from 155mm cannon shells. These innovations reflect China’s ambition to lead in micro-UAV technology, a field seeing increasing global competition.Other countries have made strides in this area. Norway’s Black Hornet, developed by Teledyne FLIR Defence, is already used by militaries worldwide. The latest version, the Black Hornet 4, won the 2025 Blue UAS Refresh award from the US Department of Defence for advancements in battery life, signal range, and wind resistance. Meanwhile, Harvard University’s RoboBee project has demonstrated insect-sized drones that can transition from water to air and even perch on surfaces using static electricity.Beyond military applications, microdrones are being explored for civilian use in medicine, agriculture, and disaster response. In healthcare, they could enable precision drug delivery or internal imaging. In environmental monitoring, their small size allows access to hazardous zones during floods, fires, or chemical spills.Still, with their stealth capabilities and growing autonomy, these tiny machines are poised to become one of the most ethically and strategically complex technologies of the decade.
