I was recently staying at Ilulissat on the W. coast of Greenland and was surprised to have several sightings of apparently the same N. Wheatear around my hotel. The sightings were on 16th & 18th October...during this period day temperatures were no higher than 0C and night-time temperatures were down to -8C plus considerable wind-chill...there was also 5+ cms of snowfall. Is this a normal record? and, if so, how do the birds find food...and when do they leave?