Birds of different sizes against the background of mountainsBirds of different sizes against the background of mountains
Green moss on the curb on the side of an abandoned roadGreen moss on the curb on the side of an abandoned road
Young blades of grass make their way out from under the snowYoung blades of grass make their way out from under the snow
An american tiltrotor combining the capabilities of an airplane and a helicopterAn American tiltrotor combining the capabilities of an airplane and a helicopter