Enable, the non-profit that manages the borough’s parks, is trialing special tunnels at allotment sites.
They’re using non-toxic ink to show paw prints where hedgehogs have been.
Biodiversity officers will then count the footprints to get an idea of population but they also want the public’s help spotting them.
Officers believe there is a population in Putney and Roehampton.
Those who want to take part in Hedgehog spotting are being asked to
submit their findings to gigl.org.uk