Greywing was first identified in England in the late 1920s, but may have existed in aviaries since 1875 under different names. They were known as jades, may-greens, and apple-greens in their green form, and azures, silverwings, and greywings in their blue form – the last of which stuck. Greywings have, of course, grey wings, with around 50% diluted body color, and slightly lightened cheek markings. They are the second of the three dilution mutations in budgies.
The result of crossing a Clearwing and a Greywing is a Full Body Color Greywing, or FBCG (pictured third). These crosses have two mutated alleles on the same gene, getting traits from each. Their body color and cheek markings are only slightly diluted due to their Clearwing allele, and they get light grey wings and a dark grey tail from their Greywing allele. The first breeding of these birds is unknown, but had to have happened sometime after Clearwing’s development in the 1930s. They are usually misidentified as Greywings.
