williamsnr's picture

Alder Fly

Observed: 20th May 2013 By: williamsnrwilliamsnr’s reputation in Invertebrateswilliamsnr’s reputation in Invertebrateswilliamsnr’s reputation in Invertebrates
IMG_9152.......Sialis lutaria
IMG_9172..Sialis lutaria..1400
Description:
Identifications
Species interactions

No interactions present.

Comments

ophrys's picture

Sialis

There are only 3 species and they are not that hard to tell apart with a quick check of the genitalia. It can even be done from a close-up photo of the underside of the abdomen tip.

Pages 14-17 of...

http://www.freshwaterlife.org/servlet/BinaryDownloaderServlet?filename=1...

Ian
_________________

My Flickr photos...

http://www.flickr.com/photos/52163027@N02/

Thistle's picture

Many thanks.

I'll try to look even more closely next time I see one.

Ian