Publication of this website            20 March 2012                 Modified  30 March; 07 April;12 April; 22 April; 08 May; 20 May; 12 June; 23 June; 27 June; 07 July; 27 July; 26 Aug.; 24 Dec.; 2013: 03 May ; 30 May; 11 July: 24. Aug.; 18 Dec.; 2014: 05 Feb. ; 13 March; 19 April; 24 May; 16 June; 11 Sept.; 26 Sept.; 07 Oct.; 27 Oct.; 15 Jan. 2015; 07 April; 03 May; 16 June; 29 July; 12 Sept.; 04 Nov.; 01 Dec.; 2016: 26 Feb.; 13 April; 19 July; 10 Dec.; 2017: 16 Jan.; 26 Aug.; 8 Sept.; 20 Sept.; 20 Oct.; 30 Oct.; 2018: 21 Jan.; 21 Febr.; 10 July; 14 Aug.; 25 Sept.;
© by Wekrue WebDesign 2018
Home Bird Care & Nutrition Birdblog Bird Diseases Birds2u Database Birds2u TALKATIVE Book Descriptions Birds2u Online-Store Birds for sale Gallery Recommended Links Contact Site Map


Yellow Agate Opal Intensive
The Opal Mutation in Canaries The first time, this factor appeared in 1949 at the breeder Rosner from Fuerth/Germany. Despite Mr. Rosner efforts for the recognition of the opal canaries, this mutation long remained unnoticed. Only by Netherland breeders who perfected the Opal factor, the mutation gained a great popularity among breeders in the whole Europe. The opal mutation is autosomal recessive and causes a reduction of the melanins causing a concentration of eumelanin under the central stem of the feather. Brown pigment (phaeomelanin) is inhibited. With the optical effect the Opal mutation gives a bluish aspect. The appearance in the black series is a bluish grey and in the brown series a bluish brown effect. The colour of the underside of the wing and tail feathers will be darker than the top of this feathers.
Which Characteristics must a perfect Black Opal Canary also have? The oxidization must show a maximimun of black eumelanin which with the modification of the feathers structure assumes a bluish grey  colour. The striations are unbroken, similar to the classical black series. Brown phaeomelanin is inhibited and the beak, legs and claws are black.
Which Characteristics must a perfect Brown Opal Canary also have? The striations are unbroken, similar to the classical brown series but of a bluish grey brown colour. Beak, legs and claws are brown.
Which Characteristics must a perfect Agate Opal Canary also have? In agate opal canaries the eumelanin changes from black to bluish grey. Also in agate opal canaries is the phaeomelanin absent. The striations are broken, similar to the classical agate series and outstanding from the background. Beak, legs and claws are flesh coloured.