Craig Shuttleworth
21/02/2014

Red squirrel (Sciurus vulgaris) and Grey squirrel (Sciurus carolinensis) (www.bbc.co.uk/news)
Craig Shuttleworth of the Red Squirrel Survival Trust and 69% of the general UK public think it is. However, perhaps controversially for a biologist, I’m not so sure…
How can anything so ‘cute and fluffy’ ever be a pest?
Grey squirrels are a considered a pest species that were introduced from America in 1876. We’re constantly told that they relentlessly strip bark from trees, predate on nests, eat their way into roofs and chew through wires and insulation. However, red squirrels are just as capable of doing the exact same things, a fact which campaigners often neglect to mention.
It’s also been shown that the decline of reds is due to the introduction of greys who suppress the recruitment levels of juveniles as they compete for the same food and habitat and are carriers of the deadly squirrel pox virus.

Roof damage caused by squirrels (www.squirrelcontrol.ca)
Are restoration projects really feasible?
The fact they are such a widespread pest species and have caused the native red squirrel to decline are why there are numerous projects across the UK reintroducing red squirrels and attempting to cull the grey squirrel populations. Craig talked to us about the successful Anglesey reintroduction that he was in charge of. The island started with a population of just 40 red squirrels and an estimated 3000-4000 greys however, after a cull of greys (and an eradication of the squirrel pox virus) red squirrel recruitment numbers quickly started increasing. The red squirrels are now thriving and can be found across Anglesey.
But… Anglesey is not quite a separate island; it is connected to the mainland by two bridges. Red squirrels have been sighted on the other side of the bridges so what, apart from a nationwide cull, is stopping grey squirrels returning to establish on the island and infecting the red populations? Craig also told us that if necessary, the squirrels are capable of swimming the straits.
The future for red squirrels..
I personally found it very strange sitting listening to someone that was so enthusiastic and seemingly unaffected by, essentially, the mass culling of one pest species to save another pest species. I feel that although the idea of saving a ‘cute’ native species may seem like the way forward for many people, the future for red squirrels can never be certain. Even in areas such as Anglesey where grey squirrels are no longer found, red squirrels are still susceptible to many diseases such as adenovirus and populations may never recover to the levels they were before the introduction of greys. Besides, I don’t think a complete elimination of greys from the UK is achievable, and so it will forever be an ongoing project with uncertain results.
A project so large is also inevitably going to have problems with funding and I don’t think such uncertain results warrant large fundings of public money. I can in a way however, see where the supporters are coming from and think a balance needs to be found in order to keep populations of both species in the UK, then perhaps it’s time for nature to take over and let the red squirrel find its own way to survive.
The Red Squirrel Survival Trust has a lot more information on the current efforts being made:
http://www.rsst.org.uk/