An "amazing phenomenon" has been found wrapped around trees near the River Avon by an overjoyed explorer.
The astounded Bristol walker, who did not wish to be named, made the awe-inspiring discovery yesterday (Saturday, June 5).
Three trees in the Keynsham area along the River Avon trail were cocooned in silk woven by caterpillars.
This is a process made by the caterpillar to ensure their eggs are secured and protected from predators and weather conditions.
The walker said: "Yesterday I saw the most amazing phenomenon, caterpillars had wrapped up three whole trees in silk to protect their eggs, every single branch was covered in white silk.
"It was near Keynsham just outside Bristol along the River Avon."
The silk webs hide hundreds, if not sometimes tens of thousands of caterpillars of a group of moths.
The Small Ermine moth caterpillars bring about this process by eating the leaves all over the trees which they then produce into a larvae, covering the trees in a cocoon of silk.
This is a similar process to a giant spiders web and is done before the caterpillar cocoons itself to become a moth.
The silk cocoons will slowly disappear over the summer months and the leaves from the trees will eventually grow back.
