My pet bird has her cage covered at night. If I am going on vacation, my best option is to have a friend check on her every day. This means she would be left uncovered since it would be a lot to ask for someone to check on her first thing in the morning as well as in the evening.
She is in a room with a window and the lights would be off, so she'd have a natural light cycle.
Would this be harmful to her? I have seen her take naps during the day, however each night she asks me (in her own birdy way) to put her cover on.