Aculus laevis is a gall mite that causes slightly hairy, more or less spherical galls to form on the leaves of some Willows. The galls are 1 to 2 mm high and firmly attached to the leaves. Starting off yellowish green they become reddish brown as they mature.
Believed to be fairly frequent in Britain, but poorly recorded.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015