Stanford engineers Mark Cutkosky and David Lentink developed this bird-inspired robotic drone that can mimic how birds fly, perch and carry objects. It consists of an upper half of an ordinary quadrotor drone for flying and a lower half of a pair of 3D-printed clawed feet based upon which of the peregrine falcon. The legs are designed to absorb impact energy upon landing and convert it into gripping force. Each leg is controlled by a motor and fishing line. They function similarly to the tendons

DJI S800 Retractable Landing Skid-Six advantages