He's got quite good mottled feathers all down his back, I'll try and take a picture later and post it up too. D'anvers in general are very hard to get in the UK, not just the silver quail.
I bought these eggs online but only 2 of 6 made it to lockdown and then only one hatched, I've been unable to buy any of the breeds I wanted as birds so have been hatching my own with limited success since all the eggs have been posted. Out of the 4 I've hatched, if this guy ends up a roo, thats 3 roos out of 4 eggs. I managed to get 2 chicks from a breeder after incubating 2 batches of her eggs with zero hatch, one of which is also a roo. So all in all, I now have 2 pullets and 4 roos if this guy is a guy!
The chicks he lives with are chamois sebrights, the sebright roos are known for being non aggressive so I'm hoping they'll stay living together.
I guess I'll just have to remove the hens at some point until I can hatch more. Or would it be ok to leave the 2 hens with the 2 roos until my spring hatch gets big enough?