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Hi all - this is my first post! :D

I've noticed this with my Calliphorids in my lab colonies, and there is no sun for them to warm their bubbles. Was an agreement reached as to the what and why? As with the other post, the flies remain still as this happens, sometimes holding the bubble in place, other times sucking it and out.

Anyone else witnessed this in a lab environment?

Many thanks,

Sam.