Cigargoyles
Posted by Graeme Lyons , Tuesday, 15 February 2011 18:54
I went to Filsham Reedbed today and all the work that has been done there over the winter looks great. A miserable day though and I saw very little wildlife. This woody cigar-shaped swelling on a Common Reed stem, as far as I know, is the gall of the fly Lipara lucens and is known as a cigar gall (I find it hard to say cigar gall without it sounding like cigargoyle!). I think it is the only species that produces this particular type of gall on reed. I have never seen the fly but there is a grub inside that woody cigar somewhere. They seem to be common in all the reedbeds I have been in but I know next to nothing about galls. The FSC book 'British Plant Galls' is really good and I'm itching to use it more this summer.
I also found this small (c4 mm) carabid which keyed out quite easily to Bembidion biguttatum. It was hiding in some fallen deadwood, it's associated with water and damp grassland and is quite common apparently. Sorry for the rubbish photo. I struggle with Bembidions, there are lots of similar species but this one seemed very straight forward. Now, I'm hoping for some decent weather tomorrow!
I also found this small (c4 mm) carabid which keyed out quite easily to Bembidion biguttatum. It was hiding in some fallen deadwood, it's associated with water and damp grassland and is quite common apparently. Sorry for the rubbish photo. I struggle with Bembidions, there are lots of similar species but this one seemed very straight forward. Now, I'm hoping for some decent weather tomorrow!
Graeme, do you access most of your invertebrate keys from the internet? Cheers, Steve