The Color of Feathers
These are called psittacin pigments, although some refer to them as carotenoids.
Carotenoids are what give carrots and yellow squash their color. ...
www.parrotparrot.com/articles/aa022701.htm

Some fundamental questions
Apr 10, 2001 ... What is the nature of psittacin pigment? ... The name psittacin was coined to
make clear the distinction between the pigments found in ...
www.birdhobbyist.com/parrotcolour/questions.html

CockatielWorld!
These genes are list here in order in which they allow production of yellow
psittacin pigment from strongest expression to weakest: ...
www.cockatielworld.org/mutations.html

The nature of the Opaline Locus (an update) by Terry Martin
But further investigation has made me realise that I initially had overlooked
the effect in species with psittacin in the down. ...
www.birdhobbyist.com/parrotcolour/terry/opaline03.html

Eurylaime psittacin - Wikipédia
22 oct 2009 ... L'Eurylaime psittacin (Psarisomus dalhousiae) est une espèce de passereau
appartenant à la famille des Eurylaimidae. ...
fr.wikipedia.org/wiki/Eurylaime_psittacin

The Parblue Puzzle - Part 4
In the DF Goldenface, the reduction of yellow psittacin is much more .... The
wild-type gene facilitates full production of psittacin, the parblue allele(s)
...
www.birdhobbyist.com/parrotcolour/parblu04.html

Cyanoramphus Novaezelandiae/The Red-fronted Kakariki, interesting ...
Psittacin is the name which is given to the Red, Orange and Yellow pigments in
... Right the same bird disposed of Psittacin(Red and Yellow colours). ...
users.skynet.be/kakariki/The_3_elements_of_colour.htm

The nature of the Opaline Locus by Terry Martin
Pink psittacin is spread into areas where normally only yellow psittacin is ...
Psittacin is redistributed, with red pigments being spread over the head and ...
www.birdhobbyist.com/parrotcolour/terry/opaline02.html

Naming and Define Colour Morphs in Agapornis and Other Psittacine ...
The wildtype with complete loss of eumelanin in feathers, eyes, legs and toes
including complete loss of yellow psittacin in feathers is called a NSL (Non ...
www.euronet.nl/users/dwjgh/proposal.htm

The Opaline Factor
An example is the blue allele which completely prevents the synthesis of
psittacin pigments (yellow, orange, and red) and can turn what would normally be
a ...
www.birdhobbyist.com/parrotcolour/opaline.html