Photographer David Pugh caught a rare glimpse of a snake slithering its way close to Rodborough Fort.
David kindly shared these pictures with Stroud Times.
Though unconfirmed, it is believed to be a grass snake, which is non-venomous and one of only three snakes native to the UK.
The other two species are the smooth snake and the adder, which is venomous.
Grass snakes are the largest snakes in Britain and can be more than a metre (3ft) long. They are often found near wetlands where they eat mainly amphibians like frogs and newts.
Grass snakes are protected under the Wildlife and Countryside Act making it illegal to injure or kill them.
The grass snake is our largest native terrestrial reptile.