Tough nut to crack: UK mulls contraceptives for grey squirrels

They have been the scourge of trees and the native red squirrel in Britain since their introduction from the United States in the 1870s.

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United Kingdom ,Britain ,Vanessa Fawcett ,Gideon Henderson ,Rural Affairs ,Red Squirrel Survival ,Department Of Environment ,Plant Health Agency ,Red Squirrel Survival Trust ,