What’s up with these red bumps I found on a tree near a river in the UK

by Bellsbutloud

2 Comments

  1. ezlikesunmorning78

    They are likely full of eggs. Some Insects will lay their eggs on leaves so the developing larvae have food.

  2. IOnlyHaveIceForYou

    That is caused by the Willow Redgall Sawfly.

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