Dragonflies and damselflies (Odonata) start their life as aquatic larvae or naiads, passing through a series of developmental stages or ‘stadia’, undergoing several moults as they grow. Before the final moult (emergence), metamorphosis occurs in which the larvae transform into the adult form. After emergence, adults undergo a pre-reproductive phase known as the maturation period, and this is when individuals normally develop their full adult colour Frey’s damselfly range
Frey’s damselfly is invertebrates_freshwater
Frey’s damselfly habitat
Found in clear, shallow, mountain lakes densely bordered with sedges and sometimes with areas of slow running water, such as from incoming streamlets, between 800 and 1600 metres above sea level Frey’s damselfly status
Classified as Vulnerable (VU) on the IUCN Red List 2007 Frey’s damselfly threats
With only seven small reproducing populations out of 14 localities recorded over a restricted area of Austria (around 500 km²), Frey’s damselfly is the rarest damselfly in Europe. In Germany, the damselfly is now regionally extinct. Threats to this subspecies are thought to include water pollution, changes in water regimes, eutrophication, the introduction of fish and climatic change. This damselfly appears to be a habitat specialist, dependant invertebrates_freshwater
Frey’s damselfly conservation
Authenticated (18/12/2006) by Jean-Pierre Boudot, CNRS, Université Henri Poincaré Nancy I, France.
- 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 invertebrates_freshwater
- IUCN Red List (February, 2008)
- Dijkstra, K.D.B. and Lewington, R. (2006) Field Guide to the Dragonflies of Britain and Europe. British Wildlife Publishing, Gillingham.
- UNEP-WCMC Species Database (August, 2006)
- Idaho Museum of Natural History (August, 2006)
- O’Toole, C. (2002) The New Encyclopedia of Insects and Their Allies. Oxford University Press, Oxford.
- Landmann, A., Lehmann, G., Mungenast, F. and Sonntag, H. (2005) Die Libellen Tirols. Berenkamp Verlag, Germany.