Ducks Have Built-In UV Goggles
Mallard ducks can see ultraviolet light, which means they notice patterns on their feathers and water that stay hidden to human eyes. This extra color vision helps them find food and recognize each other from farther away.
💡 Fun detail:
Because of their UV sight, a duck can spot a tiny fish shimmering in sunlight from several meters above the water.
Source: National Geographic