Ducks Can Detect Earth's Magnetic Field
Many duck species possess tiny magnetite crystals inside their beaks that act like a built-in compass. During migration, they sense the angle and strength of the planet's magnetic lines to stay on course even in total darkness or fog.
💡 Fun detail:
When scientists fit ducks with tiny magnetic head-caps, the birds immediately get disoriented, proving their natural navigation system works like a living GPS.
Source: National Geographic