Merula migratoria 1907 Merula migratoria Lake Umbag August 5 In my boat house at Upton I found, to-day, a Robin's nest built on cross timbers inside the building to which access can be had by a bird only through a broken pane of glass. This, as far as I can see at present, is not a fresh but the nest is not a fresh one and may have been there for several years: The nest has filled its cavity with cotton wool.