Who wins this staring contest? 👀 Kestrels (Falco tinnunculus) have sharp eyesight. They can detect ultraviolet light, which is even invisible to the human eye! This makes them excellent hunters, as they can spot urine trails left on the ground by unsuspecting prey. #EarthCapture by goldwildshot . . . . #bbcearth #bird #kestrels #birdsofinstagram #ornithology #beautifulbirds #birdwatching #wildlife #wildlifephotography #naturephotography #amazinganimals #nature #naturelovers #earth #earthlovers