The collection was owned by Mr and Mrs Robert Graves, who met Bond during a Royal Society for the Protection of Birds (RSPB) charity event in the 1980s.

Over the years, they purchased many of his paintings, but as they prepared to downsize, they auctioned their collection.

A highlight of the collection was a piece depicting a bald eagle in a snow-covered landscape, which sold for £2,800 against an estimate of £500 to £1,000.

Another study of a great grey owl in the snow sold for £2,600, while a picture of a robin sold for £1,100.