DAVID WOODFALL IMAGES / SCIENCE PHOTO LIBRARY DAVID WOODFALL IMAGES / SCIENCE PHOTO LIBRARY
Grey squirrel (Sciurus carolinensis) being dissected to show volunteers how viruses are passed between red and grey squirrels. This work is part of conservation work by the Red Squirrels Trust to remove grey squirrels from the ecosystem in Wales. Photographed in 2017, in Clocaenog Forest, UK.
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