Blue green algae warning sign, Spade Oak lake
Introduction
The photograph on this page of Blue green algae warning sign, Spade Oak lake by David Hawgood as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © David Hawgood Taken: 14 Aug 2012
Blue green algae, cyanobacteria, can produce a bloom on water surface which grows explosively in hot sunny weather. Dogs and cats are susceptible to being poisoned particularly if they lap the bloom-covered water. Here the owners of the lake warn of the potential danger.