03/01/2020
Pale fallow, In this autosomal recessive mutation the eumelanin present in the feathers is reduced by 90 to 95 percent. This major eumelanin reduction is also continued in the eyes , feet and nails . Because of this the colour of pale fallow is very light. Hence its name : pale fallow. The pale fallow also has a distinctive eye colour. They are bright red , sometimes even crystal - clear red . The reason can be found when we study the eumelanin which is still present in the eyes . The pale fallow locus ( pf locus ) affects the matrix of the melanosomes ( pigment granules ) , which has a strong influence on the eye pigmentation. this mutation has clear red eyes which look as if they are transparent. In pale fallow however there is no visible eumelanin anymore in the choroid and the retina.
Currently pale fallow can be found in the genus Agapornis in A . roseicollis , A . taranta and A . fischeri . As is the case in other fallow types these mutants are rather weak. Still they are not as weak as the bronze fallow which takes the lead when it comes to the mortality rate during the first few days. If the collection is constructed properly a lot of combinations are possible with the pale fallow mutation. I know several aviculturists who have invested a lot of effort for years and who have bred several different combinations . Geert Serlet for instance from the West - Flemish Oedelem has been breeding pale fallow A . roseicollis for a number of years now and he has already combined them with : orange face , aqua , turquoise , Aqua Turquoise , * blue * , Violet and this combined with opaline or not . In other words : nearly all possible combinations . Combinations of pale fallow with other eumelanin mutations are pointless , as you well know . O Dirk van The genetic symbol chosen is pf which is of course the abbreviation of pale fallow. Combined with green this provides the following genetic formula :Pale fallow Agapornis fischeri Over the last few decades there have been numerous reports of pale fallow Agapornis fischeri in Denmark. In 1992 we could read about Bente Nielsen who out of a pair of pure parents bred ‘ very yellow pastel greenish ' birds in 1989 , 1990 and 1991 , but with red eyes and an orange red head . Because Bente Nielsen thought he did not possess sufficient genetic knowledge to record this mutation the birds were sold to Finn Mortensen. He in turn sold two pairs ( fallow x split fallow ) to Bent Rasmussen and Calle Dall to ensure the survival of this mutation . Unfortunately only Finn Mortensen managed to breed one single fallow green bird that year. Later on John Larsen ( unwittingly ) bought a number of split bird through the local pet store and bred his first pale fallow A . fischeri not too long after that. In 2008 only a few birds from the original collection were alive and owned by Finn Mortensen who sold the remaining fallows to John Larsen. After that John Larsen sold some birds to a few breeders in the Netherlands. Pale fallow green A . fischeri can be mistaken for pastel green A . fischeri. But if you look more closely you will soon notice the bright red eyes. If you compare the bronze fallow and the pale fallow in A . fischeri you will see these differences : • The colour of the plumage is more bleached in pale fallow than in bronze fallow . • The flight feathers are white in pale fallow , but greyish brown in bronze fallow . • The red eyes are more distinctive in pale fallow than in bronze fallow .
The typical green hue on the lower body which can be seen in pale fallow A . roseicollis cannot be found in A . fischeri . The eumelanin reduction at the back of the head is present causing the red psittacine present ( although in a limited amount ) to be accentuated in A . fischeri.
Pale fallow, In this autosomal recessive mutation the eumelanin present in the feathers is reduced by 90 to 95 percent . This major eumelanin reduction is also continued in the eyes , feet and nails . Because of this the colour of pale fallow is very light. Hence its name : pale fallow. The pale fallow also has a distinctive eye colour. They are bright red , sometimes even crystal - clear red . The reason can be found when we study the eumelanin which is still present in the eyes . The pale fallow locus ( pf locus ) affects the matrix of the melanosomes ( pigment granules ) , which has a strong influence on the eye pigmentation. this mutation has clear red eyes which look as if they are transparent. In pale fallow however there is no visible eumelanin anymore in the choroid and the retina.
Currently pale fallow can be found in the genus Agapornis in A . roseicollis , A . taranta and A . fischeri . As is the case in other fallow types these mutants are rather weak. Still they are not as weak as the bronze fallow which takes the lead when it comes to the mortality rate during the first few days. If the collection is constructed properly a lot of combinations are possible with the pale fallow mutation. I know several aviculturists who have invested a lot of effort for years and who have bred several different combinations . Geert Serlet for instance from the West - Flemish Oedelem has been breeding pale fallow A . roseicollis for a number of years now and he has already combined them with : orange face , aqua , turquoise , Aqua Turquoise , * blue * , Violet and this combined with opaline or not . In other words : nearly all possible combinations . Combinations of pale fallow with other eumelanin mutations are pointless , as you well know . O Dirk van The genetic symbol chosen is pf which is of course the abbreviation of pale fallow. Combined with green this provides the following genetic formula :Pale fallow Agapornis fischeri Over the last few decades there have been numerous reports of pale fallow Agapornis fischeri in Denmark. In 1992 we could read about Bente Nielsen who out of a pair of pure parents bred ‘ very yellow pastel greenish ' birds in 1989 , 1990 and 1991 , but with red eyes and an orange red head . Because Bente Nielsen thought he did not possess sufficient genetic knowledge to record this mutation the birds were sold to Finn Mortensen. He in turn sold two pairs ( fallow x split fallow ) to Bent Rasmussen and Calle Dall to ensure the survival of this mutation . Unfortunately only Finn Mortensen managed to breed one single fallow green bird that year. Later on John Larsen ( unwittingly ) bought a number of split bird through the local pet store and bred his first pale fallow A . fischeri not too long after that. In 2008 only a few birds from the original collection were alive and owned by Finn Mortensen who sold the remaining fallows to John Larsen. After that John Larsen sold some birds to a few breeders in the Netherlands. Pale fallow green A . fischeri can be mistaken for pastel green A . fischeri. But if you look more closely you will soon notice the bright red eyes. If you compare the bronze fallow and the pale fallow in A . fischeri you will see these differences : • The colour of the plumage is more bleached in pale fallow than in bronze fallow . • The flight feathers are white in pale fallow , but greyish brown in bronze fallow . • The red eyes are more distinctive in pale fallow than in bronze fallow .
The typical green hue on the lower body which can be seen in pale fallow A . roseicollis cannot be found in A . fischeri . The eumelanin reduction at the back of the head is present causing the red psittacine present ( although in a limited amount ) to be accentuated in A . fischeri.
