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Beetle traces, Heeswijk-Dinther, Netherlands I suspect the drill hole in the middle is possibly a pupa chamber of a longhorn beetle, but I'm unsure. Note that if you zoom in, some of the smaller holes nearby show actual larvae. Europe,Heeswijk-Dinther,Netherlands,World Click/tap to enlarge Promoted

Beetle traces, Heeswijk-Dinther, Netherlands

I suspect the drill hole in the middle is possibly a pupa chamber of a longhorn beetle, but I'm unsure. Note that if you zoom in, some of the smaller holes nearby show actual larvae.

    comments (5)

  1. Very cool find, Ferdy! It does look like a pupal chamber to me too: the larvae make a raised “wall” of debris surrounding their chamber before pupating. Posted 5 months ago, modified 5 months ago
    1. Thanks! Yep, I based the presumption on this:
      https://nl.wikipedia.org/wiki/Boktorren#/media/Bestand:Anoplophora_glabripennis_-_pupa_inside_log.jpg
      Posted 5 months ago
        1. Oh wow, it even mentions the species. I do wonder if its conclusive, or if multiple species make the same chamber. Posted 5 months ago
          1. I've seen similar chambers, so am not sure. Some moth caterpillars build a wall around themselves before pupating as well. Posted 5 months ago

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By Ferdy Christant

All rights reserved
Uploaded Aug 8, 2021. Captured Jul 18, 2021 13:12.
  • NIKON D850
  • f/5.6
  • 1/60s
  • ISO125
  • 50mm