Crows are good omens I'm pretty sure. I base this on believing whatever is the opposite of what superstition says - this is something like showing superstition who is boss. I just saw a flock cruise over my house. That can only mean one thing: massively good luck today. In case I'm wrong, you at least have the good lady as a back-up plan - it sounds like if you keep her at your side he won't be back :)
Massive good luck sounds nice. I think I shall shake the hands of the next one I see!! I don't think I gave ever seen a flock of them. Usually a pair!
They are usually hanging out in a flock of 10 around here. Probably a different variety of extra good luck crows. A pair should do just fine for you though :)
I will stick with a pair and let them live a little longer and see how my fortunes change :0)