A small bird known as the swallow has been observed living for nearly ten months without ever landing on the ground. This behavior, which includes not resting, eating, or reproducing on the ground, has been recorded through studies that used GPS sensors attached to the birds. The swallow spends more than 99.5% of its time flying between nesting periods, traveling thousands of kilometers between Europe and sub-Saharan Africa without touching the ground. This remarkable ability is made possible by a neurological mechanism called unihemispheric sleep, in which one half of the bird's brain sleeps while the other remains active. This allows the swallow to rest while still navigating and avoiding obstacles. This process usually happens at dusk, with the bird climbing higher and gliding to save energy. The swallow also eats and mates while flying. It catches flying insects with its wide, slightly curved beak and drinks by skimming the surface of rivers or lakes at high speed. Mating takes place mid-air, with the two birds synchronizing their wingbeats for a few seconds before resuming their flight paths. The swallow's lifestyle challenges previous assumptions about the needs of birds, as it has adapted to rest, feed, and reproduce while in motion. Its only contact with solid surfaces is limited to the few weeks it spends nesting, typically on high buildings, under roofs, or in the crevices of old structures. Due to its long, narrow wings, a swallow on the ground has difficulty taking off. If found on the ground, it's best to gently place it on a height, such as a window ledge or a branch, to help it fly again.