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Hi
this afternoon, Easter day, I found in a fresh sample of the same water
another larva quite similar to the first one I presented to you in this topic.
I observed it on the surface on water and made a little video to save its behaviour.
Very unknown behaviour (to me) I noticed: from time to time the larva "breathes" from the air to the surface and swallows it by pushing it into its abdomen.
You will see in the video