nigra (formerly C. fulvicollis) is just one
of several similarly coloured beetles that belong to the Cantharidae
group, more commonly known as Soldier
Beetles. Female C. nigra vary in the colouration
of the pronutum, but the slightly smaller males are
generally black, or very dark in appearance. There are
about 40 UK species and they are frequent visitors to
thistles and umbelliferous flowers, where they probably
prey on other flower-feeding insects. Numbers of C.
nigra were found commonly on long grass at Eakring
Flash in July 2008.