Lady Gouldian Finch - Colour Mutations

Based on the 2005 guidelines and terminology suggested by...

A Guide to Gouldian Finches & Their Mutations

 ABK Publications

I have found this book to be easily the most comprehensive and best guide to Gouldian genetics available.  However, I also find the excellent information to be presented in a very disorganised, chaotic and confusing manner, requiring great effort on the part of the reader to make sense of it.

To save my fellow finch breeders the same effort that I've been through(!) below is the translation that I made for myself regarding the main Gouldian Finch colour mutations. I hope it's helpful!

Stephanie Thompson

(Please notify corrections/suggestions to 'finchesATfinchstuffDOTcom'.)

Green  (= Normal)

Inheritance:  Dominant. Only one parent needs to display this colouring for their offspring to display it.

Details:

All Normal markings are present:

- Cock's back is a rich medium Green with slight iridescence. Hen's back is a less intense Green.

- Cock's breast is intense deep Purple. Hen's breast is a lighter and more subdued Purple.

- Cock's belly is a rich Yellow. Hen's belly is a paler Yellow.

- The head of both sexes can be jet Black, bright Red or Orange (sometimes called "yellow").

- Line around the head is Black in both sexes.

Blue

Inheritance:  Autosomal recessive. Both parents must either display or carry this mutation for their offspring to display it.

Details:

- All Green feathers are replaced by Blue.

- Red and Orange head feathers are replaced by Beige.

- Yellow belly feathers are replaced by Cream or Beige.

Notes:

   - Babies fledge grey-blue.

- Some claim that split Blues can sometimes be identified by those with good colour vision, usually women, by a subtle blue/dull wash through the green feathers.

Seagreen

Inheritance:  Uncertain. Possibly autosomal recessive. Appears to be a parblue. May be acquired.

Details:

- Green feathers replaced by a compromise between Blue and Green - a dark Turquoise.

- Red and Orange head feathers are slightly reduced in intensity.

- Yellow belly feathers are slightly paler.

Pastel, sex-linked  

Note: Pastel Green is often called European Yellow.

Inheritance:  Co-dominant, sex-linked. The Pastel gene causes dilution of any back colour, be it Green, Blue or other variations.

Details:

Hens are always Single Factor (SF):

-  SF Pastel Green hens  appear Yellow. Black markings are replaced by extremely pale Grey or White. Blue markings are replaced by extremely pale Blue-grey or White.

-  SF Pastel Blue hens  appear White or Silver-white. Black markings are replaced by extremely pale Grey or White. Blue markings are replaced by extremely pale Blue-grey or White.

Cocks can be Single Factor (SF) or Double Factor (DF):

-  SF Pastel Green cocks   range from pale Green to Yellow-green. Black markings are replaced by Grey. Blue markings range from pale Blue to extremely pale Blue-grey.

-  DF Pastel Green cocks  appear Yellow. Black markings are replaced by White. Blue markings are replaced by extremely pale Blue-grey or White.

-  SF Pastel Blue cocks  are powder Blue. Black markings are replaced by Grey. Blue markings range from pale Blue to extremely pale Blue-grey.

-  DF Pastel Blue cocks  are Silver-white. Black markings are replaced by White. Blue markings are replaced by extremely pale Blue-grey or White.

Variations:

- White-breasted SF or DF Pastel Green birds display purer Yellow than Purple-breasted birds (similar to Australian Yellow). Blue markings become pale Blue or Blue-grey in SF, and White in DF.

- White-breasted SF or DF Pastel Blue birds appear more Silver or White than Purple-breasted birds. Blue markings become pale Blue or Blue-grey in SF, and White in DF.

Notes:

- Early experience with breeding this mutation lead some to believe that a genetic ‘lethal factor’ exists that causes the death of chicks born to pairings of DF cocks with SF hens. However, as of 2010+ most breeders report no such problems.

- The Dilute mutation, although visually similar to a SF Pastel Green cock, is genetically unrelated. (See below.)

Dilute

Inheritance:  Autosomal recessive. Both parents must either display or carry this mutation for their offspring to display it. 

Details:

- Visually very similar to SF Pastel cocks, although usually a slightly lighter lime Green.

- Breast and belly colours are the same as Normal birds.

- Black head feathers and pencil lines become Grey to very pale Grey.

- Blue markings become extremely pale Blue.

Variations:

Due to the confusing action of the two genes, White-breasted Dilutes show black pencil lines and black head feathers approximating 85% of Normal colouring – i.e. A much darker grey than on Purple-breasted Dilutes!

Notes:

- Babies have reddish eyes – an albinism trait, rather than truly ‘dilute’. Eyes darken with age.

- Juveniles are pale cream.

- A rare mutation. As of 2007 believed to be found in Australia only.

Yellow

 = Australian Yellow 

Inheritance:  Autosomal recessive. Both parents must either display or carry this mutation for their offspring to display it.

Details:

   - Visually similar to White-breasted Pastel Green.

   - All Black markings are replaced by White.

- Purple breast is replaced by White. (Unrelated to the White breast gene!)

   - Mature birds have pure Yellow backs.

- Young birds often have Green variegation across their shoulders and back, and some Grey markings.

Notes:

As of 2007 considered to be unknown outside of Australia, although some birds rumoured to have been found in Europe and the US.

 

   is a proud supporter of...

Who's Ya Doggy? Lost & Found Dogs Online

Go there if you have lost your pet dog, or found someone else's dog.

...or check out their incredible Dog Breed Selector - the most comprehensive guide to dog breeds on the internet!

Home

 

Copyright FinchStuff.com 2005-20010