Agromyza alnivora
Description
The larvae of the fly Agromyza alnivora mine the leaves of various species of Alder creating an upper surface gallery, narrow at first but, widening considerably towards the end.
Identification difficulty
Adult 
Leafmine 
ID guidance
Leafmine occurs on Alder. http://www.leafmines.co.uk/html/Diptera/A.alnivora.htm
Habitat
Where Alder, the larval foodplant is present.
When to see it
Mines may be encountered when Alder is in leaf especially in summer and early autumn.
UK Status
Widespread but rather local in Britain.
VC55 Status
Status in Leicestershire and Rutland not known.
Graham CalowStoney Stanton, Highgate Lodge Farm open access land30 October 2020leafmine on Alder
Graham CalowNear Aston Lane, Sharnford10 September 2018leafmines on Alder
Graham CalowBurbage Common19 September 2018leafmine on Alder
Graham CalowNear Olive Close, Burbage24 October 2018leafmine on Alder
Peter SmithHolywell Park, Loughborough19 July 2018Leaf mine on alder
Graham CalowBurbage Common19 September 2018leafmine on Alder
Graham CalowStoney Stanton14 October 2017leafmine on Alder
Leicestershire & Rutland Map
Enter a town or village to see local records
MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015
UK Map
Graham CalowBurbage Common08 October 2017leafmine on Alder
Graham CalowStoney Stanton14 October 2017leafmine on Alder
Peter SmithHolywell Park, Loughborough19 July 2018Mine hardly seen on underside of leaf
Peter SmithHolywell Park, Loughborough19 July 2018Backlit.
Graham CalowNear Aston Lane, Sharnford10 September 2018leafmines on Alder
Graham CalowFosse Meadows, Sharnford17 October 2018leafmine on Alder
Graham CalowNear Olive Close, Burbage24 October 2018leafmine on Alder
sueBagworth CP, lakes22 September 2018
sueGlenfield, County Hall18 October 2018
Peter SmithCropston10 November 2018Leaf mine on alder
sueBagworth Beacon07 October 2018
