i've heard of greygreen budgies, now i've heard that they can be light or dark!! how can you tell the difference, obviously one would be darker, but if you had only one of the 2 how can you tell the difference?? has anyone got pics of light & dark greygreens??
There are a lot of places on the internet where you can look at pictures that help distinguish the differences. I googled it and this is one of a zillion sites that will give you a chance to see the differences in these mutations and many others: