Fannia larvae do, indeed, feast on diverse rotting organic materials. The details Celia offered suggested to me that an animal carcass was the most likely source. Perhaps, the animal traps need to be visited with an increased frequency to avoid an encore performance of flies and other undesired beasts.
-Rich Richard J. Pollack, PhD Senior Environmental Public Health Officer Environmental Health and Safety (EH&S) | Harvard Campus Services 46 Blackstone Street., Cambridge, MA 02139 C: 617-447-0763 www.ehs.harvard.edu IdentifyUS LLC<https://identify.us.com/> From: pestlist@googlegroups.com <pestlist@googlegroups.com> on behalf of Celia Bockmuehl <celia.bockmu...@magd.ox.ac.uk> Date: Friday, October 27, 2023 at 12:22 PM To: pestlist@googlegroups.com <pestlist@googlegroups.com> Subject: Re: [PestList] Re: Identification help please Dear Richard and Tony, Thank you so much, that makes sense. There was a small enclosed rodent trap near to where they were found and I thought that I could smell a dead animal so they are going to get that checked out. Many thanks, Your help is much appreciated, Celia Sent from Outlook for Android<https://urldefense.proofpoint.com/v2/url?u=https-3A__aka.ms_AAb9ysg&d=DwMFaQ&c=WO-RGvefibhHBZq3fL85hQ&r=GO7C3XN3WgFy2IP-bFBbnUs_CYntqj57Dprtl40-_KE&m=gkA0gdUILQCW45XduxKfaWhJwOg282e25CL_gxSGf76WZ9h8TK17L-1UYJ2re42H&s=xQO9_rKMOHuDWUTRpF7uayg-Z5OLcX6ERFl4TdDCwsg&e=> ________________________________ From: pestlist@googlegroups.com <pestlist@googlegroups.com> on behalf of Dr Tony Irwin <dr.tony.ir...@gmail.com> Sent: Friday, October 27, 2023 5:00:09 pm To: pestlist@googlegroups.com <pestlist@googlegroups.com> Subject: Re: [PestList] Re: Identification help please I would agree that these are Fannia larvae, but they breed in a wide variety of substrates - rotting vegetables, birds' nests, wasps' nests, as well as dung and carrion. Tony Dr A.G.Irwin 47 The Avenues Norwich Norfolk NR2 3PH England mobile: +44(0)7880707834 phone: +44(0)1603 453524 On Fri, 27 Oct 2023 at 14:49, Pollack, Richard J <richard_poll...@harvard.edu<mailto:richard_poll...@harvard.edu>> wrote: These seem consistent with larvae of Fannia. There’s almost certainly an animal carcass nearby. Get Outlook for iOS<https://urldefense.proofpoint.com/v2/url?u=https-3A__aka.ms_o0ukef&d=DwMFaQ&c=WO-RGvefibhHBZq3fL85hQ&r=GO7C3XN3WgFy2IP-bFBbnUs_CYntqj57Dprtl40-_KE&m=gkA0gdUILQCW45XduxKfaWhJwOg282e25CL_gxSGf76WZ9h8TK17L-1UYJ2re42H&s=9IPL5_9XY7yEF2Qk9QVHAoDRP2e1pCVHjGcdFddYIOU&e=> ________________________________ From: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> on behalf of Celia Bockmuehl <celia.bockmu...@magd.ox.ac.uk<mailto:celia.bockmu...@magd.ox.ac.uk>> Sent: Friday, October 27, 2023 9:00:36 AM To: 'Adrian Doyle' via MuseumPests <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> Subject: [PestList] Identification help please Dear Google pest experts, I have been asked to look at the attached larvae. They have appeared in large numbers (20 in one day, 19 the next) this week in Oxford in the UK in a corridor of an old building which was converted into an archive space about 15 years ago. The environment where they were found is cool and not controlled. I thought that they omitted a rather unpleasant smell. I have no idea what they are and would be most grateful for some help in identifying them. The rule is in millimetres, they are between 10mm and 15 mm in length. Apologies for the poor images - they were moving when I was trying to photograph them. They are cream/brown/dark brown in colour. One cleaner found one in her hair and thought they could be dropping from beams above. Any expert identification would be much appreciated. Many thanks, Celia Celia Bockmuehl ACR Icon Interim Head of Conservation Oxford Conservation Consortium St Cross Road Oxford OX1 3TX Tel: 01865 271520 Working hours : Monday, Tuesday and Friday 07.30 - 15.30 wfh half day split between Wednesday and Thursday -- You received this message because you are subscribed to the Google Groups "MuseumPests" group. 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