Horizontal scars on eucalyptus bark

[Carbonze]

Has there been resolution of this mystery? I've just visited Tassie and was struck by the prevalence of horizontal scars in bark. Insects seem unlikely - why horizontal! Maybe it's lenticel-based
(https://snr.unl.edu/data/images/trees/s ... bark_1.jpg)

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[Xplora]

There are wood boring insects that leave scars like this. Longhorn beetles are one. One type is responsible for ringbarking snowgums. Google will give you plenty of information.

[Xplora]

Also have a review of this thread https://bushwalk.com/forum/viewtopic.ph ... 8&start=30
Page one seems to be off the mark but it gets better. Could be a marsupial getting sap also.