Pear Slug Sawfly Caliroa cerasi

In September 2021 I saw Martin Harvey's and Andy Musgrove's tweets about this species' larvae and immediately thought that I had recently seen them locally on Hawthorn and not realised what they were. Later I couldn't find them where I remembered seeing them but soon found them at a number of other sites around the parish, mostly on Blackthorn or other Prunus (domestic Plum I think) but also on Cotoneaster.

Pear Slug Sawfly Caliroa cerasi larvae, North Elmham Cathedral Meadows (Norfolk, UK), 6th October 2021

Pear Slug Sawfly Caliroa cerasi larvae, St Mary's Churchyard, North Elmham (Norfolk, UK), 8th October 2021

This one was on Wild Cherry.

Pear Slug Sawfly Caliroa cerasi larvae, North Elmham Cathedral Meadows (Norfolk, UK), 22nd September 2023