The study documents that rest behavior in *Drosophila melanogaster* is a sleep-like state, characterized by prolonged immobility, reduced sensory responsiveness, and homeostatic regulation. Flies exhibit periods of immobility lasting up to 26 minutes, with sporadic small movements, and show increased responsiveness to stimulation during rest. Rest is regulated by both circadian and homeostatic factors, as evidenced by the rest rebound phenomenon after rest deprivation. The study also explores the neural mechanisms underlying rest, finding that drugs acting on mammalian adenosine receptors alter rest behavior similarly to sleep. Additionally, the roles of the *timeless* and *period* genes in rest regulation are distinct, with *timeless* being crucial for homeostatic rest rebound. These findings suggest that rest in *Drosophila* shares conserved neural mechanisms with sleep in mammals, providing a valuable model for studying sleep function and control.The study documents that rest behavior in *Drosophila melanogaster* is a sleep-like state, characterized by prolonged immobility, reduced sensory responsiveness, and homeostatic regulation. Flies exhibit periods of immobility lasting up to 26 minutes, with sporadic small movements, and show increased responsiveness to stimulation during rest. Rest is regulated by both circadian and homeostatic factors, as evidenced by the rest rebound phenomenon after rest deprivation. The study also explores the neural mechanisms underlying rest, finding that drugs acting on mammalian adenosine receptors alter rest behavior similarly to sleep. Additionally, the roles of the *timeless* and *period* genes in rest regulation are distinct, with *timeless* being crucial for homeostatic rest rebound. These findings suggest that rest in *Drosophila* shares conserved neural mechanisms with sleep in mammals, providing a valuable model for studying sleep function and control.