Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
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 Chaoborus larva with fancy structures
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| Carnifex |
Posted on 05-04-2025 13:58
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 Member Location: Vienna, Austria Posts: 1943 Joined: 23.06.15 |
I mean, Chaoborus larvae are already fancy, but what (besides a more specific ID, if possible) are these bean-like structures on both ends? Lower Austria, garden pond, early April   
Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated. |
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| Tony Irwin |
Posted on 05-04-2025 20:37
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 Member Location: Norwich, England Posts: 7282 Joined: 19.11.04 |
The bean-like structures are air sacs (equivalent to a fish swim-bladder) that enable to larva to float horizontally in the water column. By filling or deflating the sacs, the larva can also rise or fall in the water column to avoid predators.
Tony ---------- Tony Irwin |
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| Carnifex |
Posted on 06-04-2025 22:03
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Member Location: Vienna, Austria Posts: 1943 Joined: 23.06.15 |
Thanks a lot, Tony, for the explanation!
Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated. |
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