The US Army’s new robotic bird drone is so realistic that actual birds have been attacking it.

The Robo-Raven, built at the University of Maryland Robotics Center, has been attacked by countless birds of prey including Hawks and Eagles.

John Gerdes, with the Vehicle Technology Directorate at the U.S. Army’s Aberdeen Proving Ground said that the realistic bird “already attracts attention from birds in the area which tends to hide its presence.” Birds have even tried to fly in formation with the robotic drones during testing flights.

Of course, it’s one thing for the Robo-Raven to be hidden among birds but quite another when the birds attack. “They will dive and attack by hitting the bird from above with their talons, then they typically fly away,” said Gerdes. Check out the video below to see just how realistic the Robo-Raven is.