Clustered on Salix in several groups on diffrent twigs, about 3mm long!
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What on earth does the black "horn" do that they have on there backs?
My idea would be a form of Camouflage to look like a thorn or bud, as the grouping together on the branch may be as well?
Lat/Lng: 50.22349, -5.30662
OS grid ref: SW642411