How do swifts eat and sleep while flying?

Swifts fly and eat during flight as their flying is energy efficient. Their body is automatically programmed to flap wings and glide just as our body breathes during sleep. Also, once a swift catches and insect, it eats it mid-air. Also, it is an evolutionary adaptation: swifts live longer because of these habits as they wouldn’t be threatened as much by predators and will not be affected by parasites