Birds: 25
Heading: South
Progress: 0%
Birds navigate using multiple redundant systems: the cryptochrome-based magnetic compass in their eyes detects Earth's field inclination (not polarity), while star navigation uses the rotation of the night sky to calibrate their internal compass. During flight, V-formations reduce drag by 65% through upwash vortices — trailing birds beat their wings in synchronized phase with the leader's wake. Click to scatter the flock; watch them reaggregate.