Adult male adder in grass, Crooksbury common, Surrey
Close-up of an Adder's head. Note the vertically-slit pupil, red eye and dark stripe behind the eye.
Gravid adult female Adder, Sheet's Heath, Surrey 2005.
Melanistic (black) Adder ©George McCarthy 2004
Adult female adder (top left) being 'mate-guarded' by an adult male adder (top right). Male chellenger approaching (bottom). Crooksbury common, Surrey
Adult (probably female) Adder at Ash Ranges, Surrey © Steve Langham
Adult female Adder coiled in deep undergrowth at Ash Ranges, Surrey © Steve Langham
Unusually-coloured female adult Adder at Frensham Common, Surrey © Steve Langham
"Dance of the Adders" male combat, at Crooksbury Common, Surrey © Steve Langham
Adult female Adder moving between cover at Eelmoor Marsh, Hampshire © Steve Langham
Juvenile adder © Jonathan Cooper - Banstead Commons Conservator