A Photo Key to Great Diving Beetles

It is generally known that Great Diving Beetles are some of our largest freshwater insects and most naturalists will know the name Dytiscus marginalis, but there are in fact 6 species of Dytiscus in Britain and Ireland as well as two other beetles which can potentially be confused with them. The object of this photo guide is to explain that confusion and allow accurate identification so that the average naturalist can record them.
Author(s): 
Adrian Chalkley
Free: 
Yes
Available as: 
PDF
Keywords: 
aquatic freshwater ponds rivers streams coleoptera