Why are the geese on a pond in King’s Lynn turning white?
- Credit: Ian Burt
For years they have been a familiar sight on the village pond or grazing on the nearby green.
Now a flock of greylag geese on the outskirts of King's Lynn have started turning white.
Experts say that the most likely explanation for the changing colour of the birds' plumage is inter-breeding with closely-related white farm geese.
Some of the 40-strong flock which live around the pond at South Wootton have gone completely white, whilst others are still in the throes of changing.
Dr Teresa Frost, from the Wetland Bird Survey, said: 'It is likely that there is a growing domestic influence on this greylag goose flock.
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'White farmyard geese are genetically descended from greylag geese, and the two will interbreed, producing grey and white offspring.
'Their behaviour is also similar, so farmyard geese, greylag geese and hybrids of the two will flock, feed and roost together.'
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