Range for Garden Spider (Araneus diadematus)

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Range for Garden Spider (Araneus diadematus)


I submitted a record of Garden Spider (Araneus diadematus) from Lanarkshire (VC77) for the Garden BioBlitz, but I received a notification telling me that my record was outwith the known range for the species. Obviously, this spider is very distinctive and occurs virtually everywhere. Has the system made a mistake?

That's an automated message

That's an automated message that just indicates that the species you're recording has not been recorded from your 10km square before - not necessarily that it's never occurred there before.  It's only as good as the coverage of recorders in the area, not saying you've made a mistake

Araneus diadematus

The response was ridiculous. A diadematus is recorded all over the UK with thousands of records all over Scotland including Orkney and Shetland. Unfortunately iRecord is not useful for recording spiders and I suggest you look at the British Arachnological Association website and click on the Spider Recording Scheme.

Gustav Clark
Not at all ridiculous

The whole of biological recording in this country is built around the various specialist societies and recording schemes, e.g. the Hoverfy Recording Scheme.  The Spider recording Scheme (SRS) is recognised as the appropriaite recording society for spiders and it is for them to decide on what records to accept, and who has access to them.  They have chosen not to export their records to NBN Atlas and to not supply any verifiers to check records on iRecord.  Spider records can be submitted to iRecord but they will not be validated. Only records submitted direct to SRS are considered.    

If you take a look at NBN Atlas for any arbitrary spider ( I took Dictyna arundinacea) you will generally find common and widestread species are scarecely recorded in England.  The list of oraganisations submitting records for D. arundinacea does not include the SRS.  Overall it is a very sad situation.  It is not possible to easily compare spider biodiversity with other taxa or to see areas which are under-recorded. Having worked though the SRS records for my local area all that I can conclude is that there have been no spider recording for more than 15 years and no one can sensibly say if biodiversity if going up or down.

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