The Status and Distribution of the scarab beetle Sigorus porcus in Cheshire and Lancashire in 2018

Summary

A desk-based survey of known records of the scarab beetle Sigorus porcus in Cheshire and
Lancashire (Vice Counties 58, 59 and 60) revealed six historic localities plus one erroneous
record in VC58. Suitable sites were scouted using Google Maps and Ordnance Survey maps.
In September 2018, a field-based survey was undertaken and a total of 70 grazed sites were
visited. Despite intensive efforts, the survey failed to find S. porcus in Cheshire, South
Lancashire or West Lancashire. Unfavourably wet weather undoubtedly had an impact on
findings but a lack of livestock grazing during the activity period between September and
November was also apparent and is considered detrimental. Recommendations include the
implementation or continuation of grazing throughout the autumn so that fresh dung is
available at the peak activity period. Further survey work is required to establish the status
of this species in Lancashire and Cheshire.

This survey was supported by a grant from Tanyptera Trust.

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