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Jade is just one of the colors.......
main reseason calling a bird emerald (3/4 green) doesn't work any more you can't tell by looking a bird 5/8 could look like a emerald. A 3/4 bird could look like a lesser % spalding........
Only good records and GOOD MATH can you tell true...
Now this is where you will find a big differents the birds.
Some 50% will take more after the blue ,other after the green. all from the same clutch.
Spalding do NOT breed true