Dates of First Dragonflies


Species 2003 2004 2005 2006 2007 2008 2009
May
Pyrrhosoma nymphula   4.5 11.5 12.5   9.5 22.4   9.5   9.5
Libellula depressa 26.5 30.5 27.5   4.6   1.5 12.5 18.5
Libellula quadrimaculata 16.6 ? ?   1.7 21.5 ? ?
Sympetrum fonscolombii ? ? ? ? 21.5 ? ?
Coenagrion puella 26.5 20.5 21.5   9.6 22.5 29.5 25.5
Calopteryx virgo 29.5   8.6 27.5 13.6 24.5   9.6 29.5
June
Orthetrum cancellatum ? ? 13.7 15.7 21.5 11.6 ?
Enallagma cyathigerum 26.5   9.6 27.5 16.6 18.5   9.6 12.6
Cordulia aenea ? 30.5 12.6 13.6 24.5   9.6 13.6
Somatochlora metallica 16.6   7.7 15.6 16.6   4.6   9.6 24.6
Cordulegaster boltonii 16.6 23.7 24.6 24.6 27.7   5.7 24.6
Gomphus pulchellus ? ? ? 24.6 ? ? ?
July
Aeshna cyanea 16.6 11.6 19.6   3.7   2.7 22.6   4.7
Anax imperator 20.7 14.6 10.7   1.7   4.6 30.6   4.7
Sympetrum sanguineum 20.7 22.7 10.7   8.7   8.7 ? ?
Calopteryx splendens 25.6 ?   3.7   3.7   5.8 ? 15.7
Sympetrum danae 20.7 18.7 ? ? ? ? ?
Ischnura elegans ?   6.7 13.6 24.6 21.7 24.7 ?
Leucorrhinia dubia ? ? ? 31.7 ? ? ?
August
Sympetrum flaveolum ? ? 28.8 27.7   6.8 ? ?
Lestes sponsa   7.7 22.7   3.8 14.7 25.7 30.7 10.8
Sympetrum vulgatum ?   9.8 ? ? ? 29.6 15.8
September
Lestes viridis 20.7 19.7 13.8   6.8 ?   9.9
November
Sympetrum striolatum ? 10.9 10.10 ? ? 11.10


Translations

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