Status: - Found throughout the lowlands of Ireland, Wales and England. Where it is present it is often abundant. There are a limited number of sites north of Hull, mainly to the east of the Pennines.
Habitat: - Mostly open, slow flowing, muddy bottomed small rivers and streams. They can be found on lakes and ponds that are adjacent to suitable rivers and streams. Individual members of both sexes are encountered well away from their preferred breeding sites. There is even some suggestion that individuals may cross the North Sea.
Flight period: - Mid May to mid September.
General: - With high population densities only a proportion of the males can hold territory. Territories seem to be small and are defended vigorously. Copulation is brief lasting 5 minutes or less. The female egg-lays into a wide variety of marginal vegetation while the male remains on guard but not in contact with the female. Territories must support stands of relatively tall vegetation for perching and egg-laying but sites shaded by trees will rapidly become unsuitable.