Two extra birds came home with ours the other day and hung out on the rooftop all day. Ours go out in the morning and then later in the afternoon and the two extra ones waited on the roof for the afternoon flight. At end of the day they left but returned again the next morning. This time, only one stayed all day....and its still here! I have offered some food and water and an empty cage for shelter but so far it isn't interested in anything but sitting there. I wonder if it is ill, old or that there is some other reason why it doesn't home....