[1] The depth of the green or blue suffusion varies in individual birds, but is always more intense towards the vent and on the rump.
The throat spots, head and neck striations, and wing markings are a medium brown on a yellowish ground.
Mr Moffat's father looked after the birds while he served in the RAF, and when he returned home at the end of the war he decided to concentrate on Fallows.
These came from a blood-line which originated from Richie Kerr of Greenock, who was known to be a friend of Mr Moffat Snr, suggesting that this was probably a Scottish Fallow.
Further Fallows have been bred more recently by two Scottish fanciers from descendants of these birds, so the variety is not completely extinct.
In 1964 John Papin of California wrote[9] that in America no less than five distinct Fallow varieties existed.
Later, English, German and Scottish Fallows were proved to be distinct and separate mutations by test matings made independently by T G Taylor,[8] Mrs Amber Lloyd of Walton-on-Thames[8] and Frank Wait,[12] and qualified names were then introduced to distinguish them.
The Scottish Fallow is an autosomal mutation causing recessive changes to the form of the melanin pigment.
That is, the presence of a single wild-type allele is sufficient to permit the full production and normal distribution of the black melanin pigment.