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Dear Diptera-community,

this larva has been found on a 2 weeks old piece of cowmeat in the Upper Saltmarsh on Spiekeroog Island in September 2015. Do you have any ID?

Thanks for your effort and cheers,

Hagen

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Can you photograph the hind spiracles?

In North America the most common large maggots in carrion are Sarcophagidae and Calliphoridae. They are distinguished by this key couplet:

Posterior spiracles in a deep spiracular cavity (Fig. 84); spiracular openings inclined more or less vertically; ecdysial scar usually not visible; peritreme incompletely encircling spiracular plate... Sarcophagidae

Posterior spiracles exposed at apex of terminal abdominal segment (Fig. 82); spiracular openings obliquely inclined; ecdysial scar present; peritreme completely encircling spiracular plate... Calliphoridae

See Manual of Nearctic Diptera volume 1 chapter 5 page 144.
http://esc-sec.ca..._vol_1.pdf

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Dear John,

normally, Calliphoridae and Sarcophagidae are the usual suspects - so far so good. But I had a lot of other strange fliy larvae inside (like Fannia spec. and others).

Because of the neccessary resolution, pics had been uploaded here:

https://cloud.gmx.net/ngcloud/external?locale=de&guestToken=aRr_seNKRNK9geZJRurqpA&loginName=hagen.andert@gmx.de

Thanks again!