Finding the White Letter Hairstreak
Published: 13 July 2009
On Saturday 27th June 2009 there was a nature walk at Horsenden Hill organised by the London Natural History Society, Butterfly Conservation and the Amateur Entomologists' Society.

A photograph of a White-Letter Hairstreak Satyrium w-album.
Photograph by Pengannel licensed under Creative Commons.
The group quickly located the target species (White Letter Hairstreak) and, after a bit of waiting, most got good views of one through the telescope. Purple Hairstreaks helpfully provided a contrast.
The group then took a walk around to look for other insects, a full list of the species seen appears at the end of the report.
The AES would like to thank David Howdon for running the event and for providing the information for this report.
Insects seen
Lepidoptera
- Six-spot Burnet - Zygaena filipendulae
- Narrow-bordered Five-spot Burnet - Zygaena lonicerae
- Agapeta zoegana
- Green Oak Tortrix - Tortrix viridana
- White Plume Moth - Pterophorus pentadactyla
- Small Skipper - Thymelicus sylvestris
- Essex Skipper - Thymelicus lineola
- Large Skipper - Ochlodes faunus
- Large White - Pieris brassicae
- Purple Hairstreak - Neozephyrus quercus
- White-letter Hairstreak - Satyrium w-album
- Common Blue - Polyommatus icarus
- Comma - Polygonia c-album
- Speckled Wood - Pararge aegeria
- Marbled White - Melanargia galathea
- Gatekeeper - Pyronia tithonus
- Meadow Brown - Maniola jurtina
- Treble Brown Spot - Idaea trigeminata
- Silver Y - Autographa gamma
- Burnet Companion - Euclidia glyphica
Other insects
- Roesel's Bush Cricket - Metrioptera roeselii
- Meadow Grasshopper - Chorthippus parallelus
- 7-spot Ladybird - Coccinella septempunctata
- 24-spot Ladybird - Subcoccinella vigintiquattuorpunctata
- Emperor Dragonfly - Anax imperator
Vertebrates seen
- Slow Worm - Anguis fragilis
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