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The Society for the study of flies (Diptera)

Affiliated to the British Entomological and Natural History Society (BENHS)

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#1 2018-09-21 09:42:19

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1012

Are these fly larvae or something else?

I don't recognise these maggots - they are not the sort of maggots that crawl out of waste bins, where house flies have laid eggs.
I am not familiar with these life forms at all, but in recent inspections of cattle dung, I've not seen anything like this.
Do they relate to flies at all?
About 3 mm long.

Thanks.
Nigel G.


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#2 2018-09-21 11:41:16

Tony Irwin
DF Members
Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 759

Re: Are these fly larvae or something else?

One of the cow-dung Psychoda species

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#3 2018-09-21 14:30:08

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1012

Re: Are these fly larvae or something else?

Thanks Tony. I would never have guessed that.

I've done a bit of digging around, and found this post by Malcolm Storey.
https://diptera.info/forum/viewthread.p … d_id=79028

He also points to his images at https://www.bioimages.org.uk/html/r168649.htm

It looks a pretty good match, but then there might well be several similar.
I wonder whether, given the apparently limited distribution of this species, it's justified in collecting some to get better photos, though the idea of breeding them in a pile of sloppy cow dung does not appeal!

On the other hand, it might be another species which is dead common.

Any suggestions?  Thanks.

Nigel

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#4 2018-09-21 17:32:19

Tony Irwin
DF Members
Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 759

Re: Are these fly larvae or something else?

I wouldn't pretend to know much about cow dung psychodids, but I suspect that rearing males is the only way to obtain completely reliable identifications.

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#5 2018-09-22 09:16:00

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1012

Re: Are these fly larvae or something else?

I suspect you are correct, Tony, in saying that.  But I hope you'll understand that it isn't my preferred option!
I shall do a little more digging (pun unintended) to see if that is likely situation, and see what's my best option.

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