Light green opaline-pastel

green opaline-pastel

Description: The picture shows a cock. The head, throat and hind neck are silver white. The beak is horn coloured. So are the nails. A little bit of blue is seen above the nostrils. The back is green. The rump is sky blue. The two middle tail feathers are green. The outside tail feathers are yellowish green. The shoulder is light cobalt blue. The light brown wing coverts have a broad yellow margin. The eyes are red. The legs are flesh coloured. The flanks are white. In the flights there is a white patch. The tips of the primaries are light brown and light sky blue. The breast is silver grey.


Name giving: I named this surprising new colour variety of the Bourke light green opaline-pastel. Compared with the green opaline this green is light green. The colour green is the reference colour. Opaline is not a colour name but a term that refers to certain characteristics of the eumelanin distribution in the plumage. Some of the opaline characteristic are seen: The distribution of eumelanin, more melanin on the flights, less melanin on the back and a white patch on the flights. Pastel is not a colour name but is used for an other characteristics of the melanin. The brown melanin of the wildtype is reduced in the whole plumage and in the eye. We notice this reduction of the melanin very clear when we compare this with the wildtype at the picture. When the melanin is reduced in the cortex of the barbs and in the barbules, the yellow pigment shows up. In this colour variety the wing is yellowish brown. On the back and the tail we find a combination of the new blue structure and the yellow pigment. A nice light green colour.


Development: I developed this colour variety from the combination of a yellow pastel cock and a blue opaline hen, split for yellow pastel. The cock is split for the structural blue factor and the opaline factor. When we compare this colour variety with another opaline-pastel combination, the rose opaline-pastel (R-53) ( Pink in English, Lachs in German), we see in the whole plumage a big different colouring .

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Copyright 2003 by Bob Fregeres

E-mail: fregeres@bourkes-parakeet.nl

12/23/03