@loarie We did a small test once on observations of 3 look-a-like orange skippers and found mistakes (before validation) to influence mainly records of the rarest species, so (crowd or expert) validation is indispensable in citizen science databases! https
Population decline of #essexskipper in the Netherlands. Similar declines in Flanders of this & small skipper. See also our paper on orange skippers in Flanders https://t.co/EpFiKSEQHC with @DirkMaes5 @ThomasMerckx2, hence essex is considered VU in Flan
With these orange skipper species as an example, we could show how confusion between species can lead to wrong interpretations of species' ranges in our 2016 paper: https://t.co/2IwGgyCLtl
Ook in Vlaanderen is geelsprietdikkopje 1 van die graslandvlinders die heel wat zeldzamer geworden is en tegenwoordig beperkt is tot het oosten van onze regio, zie onze studie hierover: https://t.co/EpFiKSEQHC