Has anybody come across black hoverfly sized flies attacking alighting workers? I have some photos but can't appear to download on this forum. I can't work out if the flies are egg laying on the bees or perhaps being territorial.
I've not seen attacking flies myself although do see dragonflies catch other insects on the wing which can be quite impressive.
To get pictures on the forum you do need to upload them to another hosting site and link to them; if you have any pics, that would be great.
Welcome to the forum.