Eriophyes leionotus


The mite Eriophyes leionotus causes galls on the leaves of Birch, especially Downy Birch. The galls are distributed along the midrib over the lower half of the leaf. The bulge caused by the gall is shiny and without hairs on the upperside. The hairs on the underside of the galls are often reddish brown.

Identification difficulty

Adult Gall

Recording advice

Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.


In areas where Birch, especially Downy Birch is present.

When to see it

Galls may be encountered whenever the host species are in leaf.

UK Status

Widespread in Britain, but true status is difficult to determine due to lack of records.

VC55 Status

Status in Leicestershire and Rutland not known.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map