Researchers at Powdermill Nature Reserve observe rare gynandromorph bird containing both male and female characteristics [Pittsburgh, Pennsylvania, September 28, 2020]
Author: Dirk Van den Abeele
Birds of the Tres Marías archipelago
The Tres Marías archipelago off western Mexico, is currently considered to have 24 endemic subspecies of landbirds. In a recent
Halfsiders, gynandromorphism and mosaics
Halfsiders, gynandromorphism and mosaics By Dirk Van den Abeele Ornitho-Genetics VZW MUTAVI, Research & Advice Group Published in BVA-International journal
Have cockatiels or Agapornis species parents crop milk as pigeons have?
I am afraid not. Crop milk is a semi-solid, crumbly excretion high in fat and protein that some bird species
Results analysis blue2 feathers
Update 11/01/2022 No trace of psittacofulvins were found in feathers of blue1 or blue2 Agapornis fischeri and Agapornis personatus. As
Canary with five toes
Birds have maximum four toes, but bird feet can have different patterns. Most common are: Anisodactyly: three toes forward and
We have closed our Facebook account
We have closed our Facebook account. Further announcements related to aviculture will be made exclusively through this website www.ogvzw.org and
Violet factor in Forpus coelestis???
After we published our article in which we discussed the possible presence or absence of a violet factor in Forpus
FAQ: If blue1 and blue 2 are alleles …
FAQ: if blue1 and blue2 are alleles of the same gene, is it possible that each allele (blue1 or blue2)
Mechanisms behind mosaic canaries
A recent study, published in Science, shows that carotenoid-based sexual dichromatism in mosaic canaries, a hybrid phenotype that arises in
FAQ: what is the tangerine gene / locus in parrots?
FAQ: what is the tangerine gene / locus in parrots? To be honest, it does not exist. It was the
FAQ: Are cross sections the only way to determine colour mutations?
FAQ: Are cross sections of feathers the only way to determine colour mutations? Absolutely not. Cross sections in combination with
Impairment of mixed melanin-based pigmentation in parrots
Parrots and allies (Order Psittaciformes) have evolved an exclusive capacity to synthesize polyene pigments called psittacofulvins at feather follicles, which
On request: article Agapornis roseicollis: DM Jade
New mutation in Agapornis roseicollis: DM Jade (Article published in 2017 / update 2018) By Dirk Van den Abeele Ornitho-Genetics
Asteriornis maastrichtensis
Amateur paleontologist Mr. Maarten van Dinther discovered in 2000, near the Dutch border in Belgium a fossil from probably one
Grey Forpus coelestis
We recently concluded our investigation into the AR grey factor at Forpus coelestis. An article about this mutant will, in