Libellula depressa

 
Common Name:
Broad-bodied Chaser
Odonata
Order:
Odonata
Suborder:
Anisoptera
Family:
Libellulidae
Genus:
Libellula
Species:
L. depressa
The Name
Libellula depressa (Linnaeus, 1758), the Broad-bodied Chaser, is one of the most common dragonflies in Europe and central Asia. It is very distinctive with a very broad flattened abdomen, four wing patches and, in the male, the abdomen becomes pruinose blue.

L. depressa is very distinctive and should not be confused with any other dragonflies in the region.

Mature males may sometimes be confused with males of the Black-tailed Skimmer (Orthetrum cancellatum) which also has blue abdomen, however the latter has a much narrower abdomen and there is no dark patch at the wing-base. Immature males and females (yellowish-brown abdomen) are similar to the Four-spotted Chaser (Libellula quadrimaculata) but the latter has a much narrower abdomen and a dark patch in the middle of the leading edge of each wing.

This species is usually placed in the genus Libellula but there is some evidence, based on RNA and DNA analysis, that this species should be placed within the genus Ladona (Artiss et al, 2001). This change is not yet generally accepted and books and field guides list this species as Libellula
 
 
 

 

The Characteristics
Length: 39-48mm, Hindwing Length: 32-38mm

The male and female have a broad, flattened abdomen which is brown with yellow patches down the sides. The males quickly develop a blue pruinescence on the abdomen with yellow spots along the segment sides. Females are a golden brown on the abdomen, again with yellow spots at the margins. Both the male and female have broad antehumeral stripes. 
 
 
 
 
 
 

 

The Reproduction and Development
L. depressa is seen near still-water lakes and ponds, feeding on many types of small insects. They occur in both bare and sunny locations, where it is often the first dragonfly to colonise new habitats such as newly created ponds, and well vegetated ponds. L. depressa are often seen away from water as the adults are very mobile and undergo a period of maturation away from water after emergence. The adults are also migratory.

The flight period is from April to September but are mostly seen in May and June. Their flight is very fast as they dart and dive above the water. They are very territorial and will fight with rival males and any other dragonflies they happen to encounter. They characteristically return to a favoured perch, in the sun. When a female enters a male's territory the male will fly up and grab the female. Mating occurs on the wing and the pair are in tandem for only a brief period, often less than a minute. The pair separate and the female will find a suitable location for ovipositing, usually a stretch of open water with submerged vegetation. The female oviposits in flight, hovering above the water and dipping the tip of her abdomen in. The eggs hatch in 4 or 5 weeks and the larvae take one to two years to develop. The larvae live amongst the aquatic vegetation at the bottom of the pond but not buried in mud like some other species of dragonfly. After emergence the adults move away from water and undergo a period of maturation which lasts 10 to 14 days.
 
 
 
 
 

 

The Distribution
L. depressa is found in central and southern Europe, central Asia and the Middle East. It range extends northwards to southern Scotland, southern Sweden and southern Finland and it occurs on some Mediterranean islands including Corsica, Sardinia, Sicily and Menorca. Its range does not extend beyond southern Europe into Africa.
 
 

 

The Protection Status
Common and abundant throughout its range.
 

References:
http://en.wikipedia.org/wiki/Broad-bodied_Chaser
http://www.habitas.org.uk/dragonflyireland/5637.htm
The Species on Stamps
Bulgaria
1993.12.15
Germany
1991.07.09
Russia
2001.04.05

 
Mozambique
2011.01.30

 
 
 
 
 

 


With courteous to Mr. Richard Lewington for the Dragonfly Illustration
         
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