Skip navigation
600 Views 3 Replies Last post: Jun 25, 2013 2:08 PM by bombuslucorum - Museum ID team RSS
Currently Being Moderated

Jun 12, 2013 12:42 PM

Larvae emerging from sleeper. What are they?

This picture was posted on a local farmers' Facebook forum but no one has any idea what they are. They are emerging from an old sleeper, and are roughly 5mm wide and the protruding part is about 2-3cm long. The sleeper is in Kent. We'd really like to identify them.

Attachments:
  • Currently Being Moderated
    Jun 12, 2013 4:22 PM (in response to Anita)
    Re: Larvae emerging from sleeper. What are they?

    I'm leaning towards vacated cranefly puparia - but still trying to convince myself as I have never seen anything quite like this, especially the number of them.

    • Report Abuse
      • Currently Being Moderated
        Jun 25, 2013 2:08 PM (in response to Anita)
        Re: Larvae emerging from sleeper. What are they?

        I have checked with my colleague who agrees that these are the empty pupal cases of crane-flies, he adds that he believes they are a species of Ctenophora, whose larvae develop in rotting wood. These flies are fairly common in southern England and also occur in France, but it is most likely these were bred locally in Kent, eggs being laid on the decaying wood. It is unusual to see them emerging in such numbers, looks like the railway sleepers have proved to be a superb food and habitat.

        • Report Abuse

More Like This

  • Retrieving data ...

Bookmarked by (0)

What the symbols mean

  • "correct" answer available
  • "helpful" answer