Copperband Butterfly Clicking Noise

[JamesRPaquette]

I’ve had my copperband about 6 months now, got him from the LFS. Eating like a pig, however the last few days he’s been making a strange clicking noise with his mouth. I’ve tried to get it on video but it only does it every so often. Anyone ever hear of anything like this before?

 

[blaxsun]

Apparently they can, although it's not common. There was a trigger my LFS once had that would bite and hammer the glass anytime someone came near (that was one mean SOAB).