Dates of First Dragonflies


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