Particularly favoured roosting sites are at gable ends, above soffits, at the top of cavity walls near chimneys or behind bargeboards and fascia boards.
Maent yn arbennig o hoff o glwydo mewn talcenni, uwchben soffitiau, ar ben waliau ceudod gerllaw simneiau neu y tu ôl i ymylon bondo ac estyll ffasia.