I just bought a Spice Finch and a Society Finch... how can i tell between male and female?And will they breed?

to find out if they are male or female, I recommend you first ask the store where you bought them to see if they have any idea. second way is to go to your local aviary vet and see what they can do. based from what you find out you can then determine if they breed or not. If they get along well theoretically they should be able to. I'm not to experienced in breeding birds so you may have to do some additional Research.