
March moth caterpillar, Heesch, Netherlands
Found in a nearby forest, crawling upwards on oak. The dutch name "Voorjaarsspanner" roughly translates to Spring inchworm.
https://www.vlinderstichting.nl/vlinders/overzicht-vlinders/galerij-vlinder/?&vlinder=100&fase=rups
...and this would be the "small spring inchworm":

''Alsophila aescularia'', the March moth, is a moth of the family Geometridae. It is found throughout Europe and is a pest of fruit trees.
Similar species: Moths And Butterflies
By Ferdy Christant
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Uploaded Jun 1, 2020. Captured May 9, 2020 13:38.
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