This spreadsheet provides separate checklists for the picture-wing flies of VC58 (Cheshire), VC59 (South Lancashire) and West Lancashire (VC60) as at December 2021. For further details including the sources of data, national conservation status and the definition of “occurrence” see: Brighton, P. 2021. The Diptera of Lancashire and Cheshire: Picture-wing Flies (Opomyzidae, Pallopteridae, Platystomatidae, Tephritidae,...
The Oak Marble Gall Wasp: Andricus kollari
Merseyside BioBank guide to the ecology, biology and identification of Andricus kollari and similar Andricus in the North Merseyside area by James Pearson.