I wish I knew. :lol:
I have a pair that is producing eggs/larvae, but they look very similar.
I am afraid to disturb them too much because their defense secretions irritate my sinuses.
inch:
You may be able to get an idea if you see who is on top when/if they mate?
Some beetles are obvious and some are not. I believe tenebrionids are the not so obvious ones as far as sexual dimorphism.
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