PROPOSAL OF THE MONITORING METHODOLOGY OF THE GREEN HAWKER Aeshna viridis Eversmann, 1836 (Odonata: Aeshnidae)

Aeshna viridis, a species of dragonfly the family Aeshnidae, is listed in Appendix II Bern Convention as well Annex IV Habitats Directive. The decline range and abundance A. viridis associated with strong dependence this on presence Stratiotes aloides water body results from decrease number suitable habitats. So far, attempts to develop monitoring methodology for have been made several European countries, including Sweden, Denmark Netherlands. This article presents proposal based evaluation indicators population condition form exuviae density adults, habitat condition: area covered by S. aloides, dense undivided patches succession anthropopressure. concept assessment observation adult specimens collecting exuviae, avoiding larvae sampling, which invasive technical difficulties. methodology, turn, association between aloides. It proposed minimum research areas within country, two-year cycle. presented requires pilot studies be carried out localities order determine validity assumptions methodology.