Ruddy Darter (Sympetrum sanguineum)
Species
Male Ruddy Darter (Sympetrum sanguineum). Taken at Otmoor, Oxon on July 4th 2010. Approx 3.25x lifesize.
Male. Taken at Otmoor, Oxon on July 4th 2010. Click image for larger version.
(1/200th sec at F13. Approx 2.25x life size.)
Male Ruddy Darter (Sympetrum sanguineum). Taken at Otmoor, Oxon on July 24th 2011. Approx 3.25x lifesize.
Male side view. Taken at Otmoor, Oxon on July 24th 2011. Click image for larger version.
(1/200th sec at F14. Approx 2.25x life size.)
Female Ruddy Darter (Sympetrum sanguineum). Taken at Whitecross Green Wood, Oxon on July 2nd 2011. Approx 3.25x lifesize.
Female. Taken at Whitecross Green Wood, Oxon on July 2nd 2011. Click image for larger version.
(1/320th sec at F14. Approx 2x life size.)
Female Ruddy Darter (Sympetrum sanguineum). Taken at Whitecross Green Wood, Oxon on July 2nd 2011. Approx 3.25x lifesize.
Female. Taken at Whitecross Green Wood, Oxon on July 2nd 2011. Click image for larger version.
(1/320th sec at F14. Approx 2x life size.)
Ruddy Darter mating wheel (Sympetrum sanguineum). Taken at Otmoor, Oxon on July 11th 2010. Approx 2.75x lifesize.
Mating wheel. Taken at Otmoor, Oxon on July 11th 2010. Click image for larger version.
(1/125th sec at F13. Approx 1.5x life size.)

© David Hastings

Description

Wing span: 46-61mm; Body length: 34-39mm
 
This species is smaller than the Common Darter. It has entirely black legs. An intense orange colouration can be seen at the very base of the wings. The pterostigma is brown. There are usually two prominent black marks on S8 and S9. The males become blood-red with maturity with a red frons and red-brown thorax. There is a very noticeable constriction of the abdomen around S4, giving a club-shaped appearence. Females have a ochre yellow abdomen and thorax. Older females may develop some red along the midline and segment boundaries of the abdomen.
 
It prefers waters with lush marshy vegetation, but generally avoids running or acidic waters. It is most common in eastern and southern England, but is extending its range north and westwards.
 
Territories are usually established slightly back from the water's edge. Mating lasts a few minutes and usually occurs while perched and away from water. The large eggs are laid in vegetation or damp mud, either with the pair in tandem, or with the male in close attendance. They only hatch when covered with water. Larval development is rapid and adults usually emerge after a year.
 
The main flight period is June and July, but individuals can persist into November.

Sightings

02-Oct-2011:Otmoor, Oxon (2)
29-Aug-2011:Otmoor, Oxon (20+)
31-Jul-2011:Parsonage Moor, Oxon (2)
24-Jul-2011:Otmoor, Oxon (30+)
02-Jul-2011:Whitecross Green Wood, Oxon (1)

28-Aug-2010:Dry Sandford Pit, Oxon
22-Aug-2010:Tophill Low, E. Yorks
15-Aug-2010:Otmoor, Oxon
24-Jul-2010:Bernwood Forest, Bucks
24-Jul-2010:Whitecross Green Wood, Oxon
11-Jul-2010:Otmoor, Oxon
04-Jul-2010:Otmoor, Oxon
26-Jun-2010:The Brenne, France
25-Jun-2010:The Brenne, France
24-Jun-2010:The Brenne, France

22-Aug-2009:Otmoor, Oxon
16-Aug-2009:Pinkhill, Oxon
02-Aug-2009:Otmoor, Oxon
05-Jul-2009:Otmoor, Oxon