Saturday, 20 July 2019

Another Eudonia sp

Open to correction

Not a definitive but an opinion to best practice all naturalists will have there own

Scops Often put to the back of the pile or ignored in the Field . I have thrown this post together as a holding page for various specimens as found .

General principles

Scopariinae are a difficult group to identify. Best to document fresh specimens when found as opposed to worn if an option on a catch. Worn moths if there is any uncertainty  might best be reflected as Eudonia sp. Mines Rearing and Gen det are other routes to certainty.. Not applicable on Calderdale Moths but it is suprising how many experts sometimes dont validate there own observations.

Validation can include vouchers for Gen Det , Shared Imaging for Confirmation by Experience , Never give an  officer a map share the route and get there without hitch . A second opinion never goes amiss , respect others on the journey. The use of Keys see below is usually a good way of whittling down the options but even the best keys sometimes yield ambiguity

Identification in the loose sense can be express to  family , genus or species.  It can vary with confidence  from Certain, to Likely at various levels based on a number of factors including similars , markings , size , foodplants , etc  and of course in some moths dimorphism ( male / female differences )

Best to use taxonnomic keys. These links are good pointers to serious Scoppers

Guide to Scoporiinae  Keys
General       Link


In respect of ground colour there is a great deal of natural variation amongst moths least alone images and it is not alone necessarily a reliable indicator  I defer again to the statement Rearing or Gen Det to be absolutely certain
Scopariinae are a difficult group to identify. In some cases it is just not possible from a look or photograph to identify
This one Looks to me to be one of the more discernible of the Scopariinae, ... Eudonia lacustrata. There are probably 3 when studied can yield a high confidence to ID  visually another  63.069 BF1342 Eudonia angustea with its narrow wings and markings being relatively distinctive

ABH 63.067 BF1338 Eudonia lacustrata

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Refs

Naturespot
UK Moths

cf

63.074 Eudonia mercurella 

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3 comments:

David Sutcliffe said...

Very helpful those photo's Colin. They are a tricky bunch. I usually give up on them and just make a note of how many and try getting photo's if they permit. I keep going back to them but the shots you put on are very useful pointers. Cheers.

Colin D said...

see links and keys David not included I'll add to this post Scops and Eudonia as found

charlie streets said...

Thanks for the link to British Lepidoptera Colin, never knew it existed. It's very detailed and definitely gives you a different slant on ID-ing moths.