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My Panesthia angustipennis angustipennis males are very noisy! 

Once in a while one of them comes to the surface and starts making noise by hammerings with its abdomen on a piece of wood. The wood and the enclosure kind of resonates and enhances the noise. 
I manages to make an audio recording with my audio recorder (see attachement). There is a lot of bass to hear (it's a decent recorder), and it gives a good idea what I have to endure here :) 

I', pretty sure this is a way to attract females. 

My question: has anyone observed a similar thing? 

20200308_Panesthia angustipennis angustipennis.mp3

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That's really cool, I've never heard of this behavior in this genus, definitely sounds like a way to attract females! :o

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I regularly observed this in all species of this genus that I had, including Panesthia a. angustipennis. Indeed, this is a demonstration of the sexual behavior of males and it is typical for the genus Panesthia, and it is possible that for the entire subfamily.

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