Saturday 15 June
Red chaser (Libellula pontica)
Red chaser fact file
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Red chaser description
Characteristic of the Libellulidae family, this red chaser has a short, broad abdomen and its whole body is markedly shorter than its wingspan (2) (3). While the male’s abdomen is a brick red, the female’s is a pale chestnut brown, both possessing a dark line running down the centre. Females also have chestnut-brown colouring at the leading edge of their wings. Both male and female red chasers have a small dark brown area at the base of their hindwings (4).
- Libellula fulva pontica. Top
- Excessive growth of aquatic plants that occurs when dissolved nutrients such as phosphorus and nitrogen run-off into lakes and ponds, which also ultimately increases the plant death rate with the result that the bacterial decomposition of the dead plants uses up oxygen. Natural eutrophication may occur gradually, but is often accelerated by run-off of agricultural fertilisers.
- Stage in an animal’s lifecycle after it hatches from the egg. Larvae are typically very different in appearance to adults; they are able to feed and move around but usually are unable to reproduce.
- An abrupt physical change from the larval to the adult form.
- IUCN Red List (September, 2007)
- Dijkstra, K.D.B. and Lewington, R. (2006) Field Guide to the Dragonflies of Britain and Europe. British Wildlife Publishing, Gillingham.
- Brisbane Insects and Spiders (September, 2007)
- Boudot, J.P. (2008) Pers. comm.
- O’Toole, C. (2002) The New Encyclopedia of Insects and Their Allies. Oxford University Press, Oxford.
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Red chaser biology
Odonata species start their life as aquatic larvae, passing through a series of developmental stages or ‘stadia’ and undergoing several moults as they grow. Before the final moult (emergence), metamorphosis occurs in which the larvae transform into the adult form. Adults complete their metamorphosis after emergence and undergo a pre-reproductive phase known as the maturation period, when individuals normally develop their full adult colour (5). Virtually nothing has been published about the red chaser’s social, reproductive or feeding behaviour, but certain details can be inferred from what is known about its western counterpart, Libellula fulva. Eggs should hatch two to seven weeks after deposition and the larval period should extend over two years, passing through 11 to 16 stadia. The adult flight period of the red chaser in Turkey lasts from early May to June, sometimes to the beginning of July, during which time they must mate (2).
Red chaser males defend territories with flights undertaken from their favourite prominent perches, but they are less aggressive than many other chaser species. Females begin to lay eggs in the water immediately after copulation, unaccompanied by the male.
Odonata feed on flying insects and are often generalised, opportunistic feeders, sometimes congregating around abundant prey sources such as swarms of other insects (5).Top
Red chaser range
Sparsely distributed in Turkey, Armenia, Iran, Iraq, Israel, Jordan, Syria and Kyrgyzstan (1).Top
Red chaser habitatTop
Red chaser status
Classified as Near Threatened (NT) on the IUCN Red List 2007 (1).Top
Red chaser threats
Small, isolated populations of this species are scattered sparsely across its expansive range, leaving them vulnerable to local extinctions. Unfortunately, suitable habitats are rare, and where they exist, they often coincide with agricultural areas and are therefore threatened with the possibility of draining, eutrophication and pollution (1).Top
Red chaser conservation
There are currently no conservation measures targeting this species.Top
Authenticated (18/12/06) by Jean-Pierre Boudot, CNRS, Université Henri Poincaré Nancy I, France.Top
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