When reviewing my leafmine records yesterday and comparing them to those I’ve blogged, I realised there are several I’ve yet to cover here. Most are spring- and summer-time finds so I’ll post about them at the appropriate time but this is one I found in December – I didn’t cover it then as I was in the middle of my A-to-Z end-of-year countdown.
These are the leafmines of the sawfly Fenella nigrita. Its larval mines can be found on Agrimony and on the various cinquefoils – I found these on Creeping cinquefoil (Potentilla reptans). Though the British Leafminers website reports that the mines are normally seen in summer and autumn, I found these on 3 December and the mines are occupied (I’ve added a pointer to one of the larvae in the photo below right). Presumably the mild weather meant a longer breeding season for these sawflies, as with many other creatures.