Is it a bird? Is it a plane? I could hardly believe my eyes when I saw this cool photo of a crow landing on an eagle.

Hyongchol Kim / Caters News Agency

Photographer Hyeongchol Kim captured the moment while photographing birds on the plains in Gyeonggi-do, South Korea.

According to Caters News, the photographer was stunned when he saw the smaller bird swoop in on the eagle and perch himself on its back.

He said: "I saw the crow flying towards the much bigger eagle, and prepared myself to capture the fight on camera. However, the bird just hovered above the eagle for a few seconds - and then appeared to just latch onto his back.

"The eagle didn't seem to mind at all - I think they must have been friends."

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TODAY.com multimedia producer Mish Whalen wonders if her two parakeets ever think about flying on each other's backs.

Kevork Djansezian / Getty Images

Two red-tailed hawks and a crow are seen during a handing off ceremony of the first of six C-17 Globemaster III airlifters built for the United Arab Emirates Air Force and Air Defence at the Boeing final assembly facility at Long Beach Airport on May 10 in Long Beach, California.

Whilst covering the handoff ceremony for a Boeing airlifter in Long Beach, photographer Kevork Djansezian spotted a very different form of aerial combat taking place in the skies above.

UPDATE: In his caption, Djansezian identified the birds of prey as peregrine falcons, but readers contacted us to say that they are red-tailed hawks. We have now confirmed this with Getty Images and updated the caption above. Many thanks to our eagle-eyed readers fred-3455755 and uplandsandpiper.