Is there no-where you could corner them, fashion something like a crook and at least get a couple home?
Are they wing clipped?
My embdens can fly if they get a good take off run.
one wouldn't come under the electric fence (propped up plenty high enough) from the big field, but took off, straight over her own field and into next one over. I went to call her, she must have worked it out, took off again and landed in the right field. they can't normally fly far, this was about 150mtrs.
There again, I suppose that's it's a bit risky near a main road!