Butterfly Conservation says while the effect of the webs "can look alarming", they protect against predators.
Environment correspondent Jon Cuthill paraglides into position ahead of a BBC South special.
The main source of pollution is local emissions, created by things like traffic and manufacturing.
Reeking coagulations of grease and debris are clotting city sewers on a colossal scale. New technologies are being used to control this modern menace.
The Woodland Trust urges people to "stick to the path" when visiting and photographing bluebell woods.
The Environment Agency is seeking the abandoned pets in order to protect native fish.
The project uses GPS 'backpacks' to track the hedgehogs as they become an increasingly rare sight.
Gloucestershire Wildlife Trust says the campaign, focusing on nature recovery, is its biggest yet.
Bempton Cliffs, one of the UK's largest sanctuaries, has seen a notable rise in younger twitchers.
