Red squirrels fed on peanuts have weaker jaws – here’s why that matters for conservation

By Philip Cox, Associate Professor in Anatomy, UCL

Red squirrels have been replaced over a large part of Great Britain by the non-native grey squirrel, introduced from North America in the late 19th century. Today, the British population of red squirrels (approximately 287,000) is mostly restricted to Scotland, northern England and some offshore islands.

This fragmented distribution is bad news for conserving red squirrels, but provides an interesting case study for scientists. Given the different climate and habitats…

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