Conserve rare species on islands or mainlands?
Does the UK's endangered red squirrel deserve protection? Not on the mainland, says one scientist, who believes it is too expensive to protect the species in an unprotected environment. The red squirrels have been forced out of much of the UK by non-native grey squirrels because they eat the reds' preferred hazelnuts and carry a virus that kills the reds squirrels but does not hard the greys. While endangered on the mainland, professor Stephen Harris says red squirrels are not endangered elsewhere, and conservation monies are better spent protecting species with nowhere else to go.
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