|Saucer Bug Ilyocoris cimicoides|
|Ilyocoris cimicoides - ventral view showing hooked front legs|
Although it may be unfamiliar if you've never been pond-dipping, it is widespread though local in distribution and can be common in some waterbodies, especially in the weedy margins of large water-bodies such as marshy dykes, old canals and lakes/large ponds.
|Ilyocoris cimicoides - side view showing hooked front legs and slightly modified mid- & hind legs|
Denton, J. (2007). Water Bugs and Water Beetles of Surrey. Surrey Wildlife Trust, Woking. [Covers a good range of species; lots of useful info and excellent photos even if you're not in Surrey].