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Butterfly Conservation
Hertfordshire & Middlesex Branch
Saving butterflies, moths and our environment

First Sightings in Hertfordshire and Middlesex for 2016

Here are 2016's earliest sightings of resident and migrant butterflies, as reported to the branch website
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Butterfly Conservation First Sightings 2016

34 species of butterfly occur most years in Hertfordshire and 30 in Middlesex, together with the occasional migrant or vagrant. The following table lists the first sighting in the two counties that have been reported to the website:

Species Name Scientific Name Hertfordshire Middlesex
Small Skipper Thymelicus sylvestris 6th June 2016 19th June 2016
Essex Skipper Thymelicus lineola 3rd July 2016 1st July 2016
Large Skipper Ochlodes sylvanus 27th May 2016 (new date) 26th May 2016
Dingy Skipper Erynnis tages 3rd May 2016 Absent
Grizzled Skipper Pyrgus malvae 12th April 2016 Absent?
Clouded Yellow Colias croceus 26th June 2016 10th July 2016
Brimstone Gonepteryx rhamni 4th February 2016 13th March 2016
Large White Pieris brassicae 14th April 2016 30th April 2016
Small White Pieris rapae 25th March 2016 22nd March 2016
Green-veined White Pieris napi 13th April 2016 2nd April 2016
Orange Tip Anthocharis cardamines 5th April 2016 12th April 2016
Green Hairstreak Callophrys rubi 3rd May 2016 7th May 2016
Brown Hairstreak Thecla betulae
5th December 2016 (eggs)
Purple Hairstreak Neozephyrus quercus 26th June 2016 28th June 2016
White-letter Hairstreak Satyrium w-album 26th June 2016 25th June 2016
Small Copper Lycaena phlaeas 4th May 2016 5th May 2016
Small Blue Cupido minimus 12th May 2016
Brown Argus Aricia agestis 11th May 2016 17th May 2016
Common Blue Polyommatus icarus 17th May 2016 15th May 2016
Chalkhill Blue Lysandra coridon 2nd July 2016 Absent
Holly Blue Celastrina argiolus 22nd March 2016 13th April 2016
Duke of Burgundy (believed to be extinct) Hamaeris lucina

Purple Emperor Apatura iris 4th July 2016 4th July 2016
White Admiral Limenitis camilla 28th June 2016 6th July 2016
Red Admiral Vanessa atalanta 13th March 2016 25th January 2016
Painted Lady Vanessa cardui 16th May 2016 14th May 2016
Small Tortoiseshell Aglais urticae 30th January 2016 17th March 2016
Camberwell Beauty Nymphalis antiopa

Peacock Aglais io 21st March 2016 22nd March 2016
Comma Polygonia c-album 14th March 2016 22nd March 2016
Dark Green Fritillary Argynnis aglaja 19th June 2016 27th June 2016
Silver-washed Fritillary Argynnis paphia 1st July 2016 16th July 2016
Speckled Wood Pararge aegeria 4th January 2016 8th April 2016
Wall Brown (believed to be now extinct) Lasiommata megera

Marbled White Melanargia galathea 18th June 2016 16th June 2016 (new date)
Gatekeeper Pyronia tithonus 8th July 2016 2nd July 2016
Meadow Brown Maniola jurtina 6th June 2016 9th June 2016
Ringlet Aphantopus hyperantus 21st June 2016 17th June 2016
Small Heath Coenonympha pamphilus 14th May 2016 12th May 2016

N.B. These first sightings are gathered as the butterfly season progresses so as to provide up-to-date information about species emergence. They are not reviewed retrospectively by reference to transect data or distribution records and therefore represent what we believed to be the first report of a species at the time in our branch area rather than a comprehensive analysis of the actual first dates recorded in a particular year.
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