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| 1 | 2 | 3 |  » Stats |
Members: 48,655
Threads: 78,892
Posts: 821,435
Top Poster: glsammy (14,779)
| | Welcome to our newest member, redfrag | |  | 
22-06-2009, 11:46 PM
|  | Knight Commander of the Wild Empire | | Join Date: Mar 2007 Location: Romford, Essex
Posts: 5,183
| | | scarce emerald damselfly?
I took these today at work. I know there one of the emeralds and that scarce are present there, but confirmation they are the scarce emerald would be welcome    |
23-06-2009, 07:39 AM
| | Wild Member | | Join Date: Sep 2006 Location: Chiswick
Posts: 226
| | | Re: scarce emerald damselfly?
Rainham ?
I don't think you can be sure, despite the very good photos. The Scarce Emerald is generally a bit more chunky, but that doesn't help much does it ?
The male of Lestes dryas is supposed to have only the first one and a half abdominal segments blueish, rather than the entire first two, so is it ? I have photos of Lestes sponsa where they have a darkened area on the rear of the second segment. The other id features don't show up on your photos.
Mick. |
23-06-2009, 10:05 AM
|  | Knight Grand Cross of the Wild Empire | | Join Date: Nov 2006 Location: North Yorkshire
Posts: 10,282
| | | Re: scarce emerald damselfly?
Its a male Emerald damselfly lestes sponsa. You can tell by the pterostigma size. |
23-06-2009, 06:52 PM
| | Wild Member | | Join Date: Sep 2006 Location: Chiswick
Posts: 226
| | | Re: scarce emerald damselfly?
Scarce Emerald has a more square pterostigma, is that right ? Any rules on how square ? Mick. |
23-06-2009, 10:31 PM
|  | Dame Commander of the Wild Empire | | Join Date: Feb 2006 Location: North Kent
Posts: 9,523
| | | Re: scarce emerald damselfly?
Neil-have you got a dorsal view of its anal appendages? I'm pretty good at these in the field and if they have the hockey stick inferior appendages turned inwards then I would say Scarce. The place and timing is also spot on for these. From some of your shots I'm sure the second segment has half the pruinescence absent too.
__________________
The female of the species is more deadly than the male.:p |
23-06-2009, 11:47 PM
| | Knight Commander of the Wild Empire | | Join Date: Mar 2007 Location: Romford, Essex
Posts: 5,183
| | | Re: scarce emerald damselfly?
Ill look. may try get some more shots tommorow but wont be posting them till next week probably |
24-06-2009, 06:47 PM
| | Knight Grand Cross of the Wild Empire | | Join Date: Nov 2006 Location: North Yorkshire
Posts: 10,282
| | | Re: scarce emerald damselfly?
Pterostigma broader in Scarce larger (<3x the width) slimmer in emerald (>3x the width). However I have little experience of Scarce in the field as there are none here so only see them when dragonfly twitching. |
24-06-2009, 09:05 PM
| | Active Member | | Join Date: Dec 2008
Posts: 35
| | | Re: scarce emerald damselfly?
Second segment of abdomen characteristic of scarce emerald | | |
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