No interactions present.
I saw this on a sawfly larva site a few times,it look's amazing.
Eriocampa juglandis is a North American species feeding on 2 trees of the genus Juglans - hence the scientific name. Eriocampa ovata is a British species that feeds on Alder and might be the one involved here.
Thank you very much for all ID's and information - particularly it being ovata which accounts for it being found on Alder.
I did not realize, this is a lovely looking sawfly,seem's to be an area were information is sparse,or are there some good web sites or book's on this subject.
To check if it is a British species, either NBNgateway or Fauna Europaea web sites.
For feeding associations - Bioimages
For sawflies - Yahoo sawfly group
Thank you for all that information, Robert.
Will check them out.
Lat/Lng: 50.8691, 1.79141
OS grid ref: TR668145