(Plates 1-4.) THE status of the Marsh-Harrier {Circus a. esruginosus) as a breeding bird in Great Britain has for many years been very precarious. For at least 45 years' prior to 1915 there are no records of successful breeding though three attempts were made at intervals in Norfolk. In 1915 a pair bred at Hickling, but neither they nor their offspring returned to nest. According to Riviere's Histor...

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