The broad, flat abdomen of both sexes of the Broad-bodied Chaser (Ladona depressa, known until recently as Libellula depressa) is distinctive. The adult male's abdomen is pale blue and he has large dark areas at the wing bases. In the hand, two large spines can be seen on the underside of the first abdominal segment of the male, just in front of the secondary genitalia, that are not present in any other European dragonfly. These dragonflies are strong fliers and are often the first dragonflies to colonize a newly created habitat. They occur in a wide range of (mostly) stagnant water habitats, especially ones that are small, shallow, sunny, and bare, such as drinking pools for cattle or quarry lakes. Females may sometimes oviposit (deposit their eggs) in very unnatural situations such as in the mud under lawn sprinklers. They rarely breed in large water bodies. The flight season runs from April to September, but abundance is generally highest in May and June. Males make fast, direct dashes from a conspicuous perch, often controlling an entire pool by driving away other males.
The Broad-bodied Chaser is among the most common dragonflies across most of Europe to 60° N (although not in Ireland, Scotland, or North Africa and scarce in southern Scandinavia). Its range extends through the Middle East and into western and central Asia. These dragonflies can be found far from water.
(Askew 2004; Dijkstra 2006)
- Askew, R.R. 2004. The Dragonflies of Europe (2nd edition). Harley Books, Essex, England.
- Dijkstra, K.-D. B. 2006. Field Guide to the Dragonflies of Britain and Europe. British Wildlife Publishing, Dorset, UK.
Molecular Biology and Genetics
Barcode data: Ladona depressa
There is 1 barcode sequence available from BOLD and GenBank. Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species. See the BOLD taxonomy browser for more complete information about this specimen. Other sequences that do not yet meet barcode criteria may also be available.
-- end --
Download FASTA File
Statistics of barcoding coverage: Ladona depressa
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
Statistics of barcoding coverage: Libellula depressa
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
The Broad-bodied Chaser, also called the Broad-bodied Darter (Libellula depressa) 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.
Identification[edit source | edit]
The male and female have a broad, flattened abdomen which is brown with yellow patches down the sides. In the male the abdomen develops a blue pruinosity that covers the brown colour. Both fore and hind wings have a dark patch at the base. Both the male and female have broad antehumeral stripes. The average wingspan is approximately 70 mm. L. depressa is very distinctive and should not be confused with any other dragonflies in the region.
Distribution and habitat[edit source | edit]
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.
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.
Behaviour[edit source | edit]
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 in the silt and detritus at the bottom of the pond, lying buried in mud with just the head and eyes showing. After emergence the adults move away from water and undergo a period of maturation which lasts 10 to 14 days.
Systematics[edit source | edit]
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
See also[edit source | edit]
References[edit source | edit]
|Wikimedia Commons has media related to: Libellula depressa|
- "Broad-bodied Chaser". British Dragonfly Society.
- Thomas Artiss, Ted R. Schultz, Dan A. Polhemus & Chris Simon (2001). "Molecular phylogenetic analysis of the dragonfly genera Libellula, Ladona, and Plathemis (Odonata: Libellulidae) based on mitochondrial cytochrome oxidase I and 16S rRNA sequence data" (PDF). Molecular Phylogenetics and Evolution 18 (3): 348–361. doi:10.1006/mpev.2000.0867. PMID 11277629.
- Askew, R. R. (2004) The Dragonflies of Europe. (revised ed.) Harley Books. ISBN 0-946589-75-5
- Boudot J. P., et al. (2009) Atlas of the Odonata of the Mediterranean and North Africa. Libellula Supplement 9 :1–256.
- d'Aguilar, J., Dommanget, J. L., and Prechac, R. (1986) A field guide to the Dragonflies of Britain, Europe and North Africa. Collins. pp336. ISBN 0-00-219436-8
- Dijkstra, K.-D. B & Lewington, R. (2006) Field Guide to the Dragonflies of Britain and Europe. British Wildlife Publishing. ISBN 0-9531399-4-8
- Hart. M., et al, (1978), The Naturetrail Omnibus, London: Usborne Publishing Limited, page 157