No interactions present.
I gather that L. caesar can be distinguished from most other Greenbottles by its silvery jowls
That helps to distinguish it from other genera of similar green flies, like Neomyia, say, but not from other species within Lucilia.
There was a useful posting on this website...
My Flickr photos...
Lat/Lng: 50.7546, -1.3156
OS grid ref: SZ483952