A LONG-DISTANCE COLONY SHIFT BY A THICK-BILLED MURRE

An eight year old Thick-billed Murre ( Uria lomvia) identified in 1997 at Hakluyt Island, Thule, Greenland, where it was apparently breeding , had been handed as a chick on Coats Island in Hudson Bay, Canada. Th is is the first known case of colony interchange in the species, which is normally considered to exhibit a very high degree of colony philop atry. The incident is briefly discussed with reference to the Common M urre (U. aalge).