The black darter (Sympetrum danae) is a dragonfly of the heath and moorland; it favours acidic boggy waters and whether that be bog pools, ditches, or whatever does not seem to matter as long as sphagnum mosses are present. With this as its main habitat it is not surprising that the Dorset heaths are a good place to find this particular insect. It can be seen flying from July through until October.
It is a very active dragonfly, darting here and there around its patch. It is not one of the more territorial species, far more interested in looking a mate than a fight with another male. They rest in cool conditions on stones and bare ground and can even be found on warm cow pats as they try to acquire heat to enable them to become active.
The black darter is the smallest dragonfly found in Britain. The male is very handsome insect; black with yellow markings! That said, the female in her golden brown dress is pretty tasty too in my opinion, but then I like dragonflies!