Salty always gets covered. His cage is in our living/dining/kitchen area ( open floor plan). We have a strict schedule, training at 9pm, over by 9:20, he gets to eat or play or roost and in bed by 10, up at 10AM.
Times are +/- 15 minutes. I sew ( no comments, now) so he has a winter and a summer cover, one heavy matl, the other light almost see thru. I;ve always covered my parrots, so can control their sleeping patterns.
FOr other posters: Parrots have really poor night vision, part of the price paid for really acute and fuller spectrum day vision. And my last parrot Max (RIP) had nite frights despite being covered.