They are both female *Calliphora*. I can't suggest which species, as I'm not familiar with your fauna. Where a number appear in a limited area, it is likely they have bred locally, perhaps in a bird carcass such as a pigeon. Blocked-up fireplaces are a common source of inaccessible (to us) bodies. Tony
Dr A.G.Irwin 47 The Avenues Norwich Norfolk NR2 3PH England mobile: +44(0)7880707834 phone: +44(0)1603 453524 On Thu, 1 Feb 2024 at 20:18, Denise Migdail <dmigd...@asianart.org> wrote: > They act like cluster flies (many appeared overnight in a window bay – > civic center, San Francisco ), They are large (10 cm average), they are > kind of sluggish. They are hairy, but are not golden. Could it be a > *Calliphora > coloradensis*? We do not smell anything rotting, but we are in a city. > > > > Any help with positive identification would be greatly appreciated. > > > > Thank you, > > Denise > > -- > You received this message because you are subscribed to the Google Groups > "MuseumPests" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to pestlist+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/pestlist/CO1PR08MB7221F92627212BE52E91C14ABA432%40CO1PR08MB7221.namprd08.prod.outlook.com > <https://groups.google.com/d/msgid/pestlist/CO1PR08MB7221F92627212BE52E91C14ABA432%40CO1PR08MB7221.namprd08.prod.outlook.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "MuseumPests" group. To unsubscribe from this group and stop receiving emails from it, send an email to pestlist+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/CAFWqZKPhZPnjMw5CDY0hmAJ2je9bSuqLAoM8Vftui9RWzwXEVw%40mail.gmail.com.
