Mirko Kovac of the Switzerland-based EPFL Laboratory of Intelligent Systems explains in a video the concept of this Glider Robot. Basically at 4.6 grams, it can perch on any surfaces and can detach itself using a motor gearbox.
Basically, it has needles in front of it. Basically, it uses the front needles to hold itself to the surface. These gliders can be deployed in swarm with sensors and etc and when they have collected data, they will perch itself to any surface waiting to be collected. Watch the video below.