Agapornis fischeri blue1blue2, dark blue1blue2 and double dark blue1blue2

The Blue1Blue2 mutation in lovebirds is a unique variation that combines two types of psittacine mutations, affecting yellow and orange pigments in the bird's plumage.

Although red and yellow psittacine pigments are still present, their intensity differs significantly from that of the Fischer's green lovebird.

This mutation, previously known as parblue, results in a severe reduction of psittacine pigments, making it an intermediate phenotype between green and blue mutations.

This mutation produces a fascinating color often described as turquoise or "blue-green." Some people also refer to it as sea green.

Blue1Blue2 is classified as a Partial Psittacine Reduction (PPR) mutation, where psittacine pigments in the feather structure partially disappear.

This color variation results from the combination of two blue gene forms in lovebirds, Blue1 and Blue2, leading to a shade known as "blue with a green haze."

Color Variations of blue1blue2 Parblue

- Blue1Blue2: Blue with a green haze.
- D Blue1Blue2: Dark blue with a dark green haze.
- DD Blue1Blue2: Double dark blue with a double dark green haze.

Basic Characteristics of the Blue1Blue2 Fischer's Mutation

Head Forehead: Yellow-orange, creating a bright and striking appearance. Crown: Gray with a bright yellow background, gradually fading toward the nape.

Cheeks: Light yellow-orange with a gray transition zone blending into the yellow neck. This transition extends through the center of the eye. Front Body Chin, Throat, and Upper Chest: Light yellow-orange, giving a soft, warm impression.

Eyes: Dark brown with white, featherless eye rings. Beak: Lighter pink compared to the wild type. Lower Body Lower Chest, Sides, Abdomen, and Anal Region: Distinctive blue-green, giving a cool and vibrant look.

Wings and Back Coat and Wing Feathers: Darker than the rest of the body, adding depth and contrast. Primary Flight Feathers: Outer feathers are blue-green, while the inner feathers combine blue-green and black.

Wing Curves: Bright yellow, creating a striking contrast. Tail Lower Back and Upper Tail Coverts: Violet, adding an eye-catching accent. Lower Tail Coverts: Blue-green, complementing the lower body.

Tail Feathers: Predominantly blue-green, with secondary feathers featuring a bright yellow-orange dot pattern in the center, partially surrounded by a black zone. Legs Legs: Gray, providing a neutral tone that harmonizes with the body. Nails: Darker gray than the soles.

Basic Characteristics of Dark Blue1Blue2 Fischer's Lovebird Mutation

The Dark Blue1Blue2 mutation (D Blue1Blue2) enhances the blue-green hue with a more pronounced green haze compared to the standard Blue1Blue2. It combines the parblue mutation with a single dark factor, resulting in a deeper, richer sea green shade.

Head Forehead: Bright yellow-orange, creating an eye-catching contrast. Crown: Gray with a bright yellow background, gradually fading toward the nape.

Cheeks: Light yellow-orange with a gray transition zone that blends into the yellow neck, forming a smooth gradient extending to the center of the eye. Front Body Chin, Throat, and Upper Chest: Light yellow-orange, adding soft color gradations.

Eyes: Dark brown with white, featherless eye rings, providing a sharp yet subtle look. Beak: Lighter pink than the wild type, giving a bright impression. Lower Body Lower Chest, Sides, Abdomen, and

Anal Region: Predominantly dark blue-green, creating a deeper, richer shade than the standard Blue1Blue2 mutation.

Wings and Back Coat and Wing Feathers: Darker than the rest of the body, adding bold contrast. Primary Flight Feathers: Outer feathers are dark blue-green, while the inner feathers combine dark blue-green and black. Wing Notch: Bright yellow, standing out against the dominant body color. Tail

Lower Back and Upper Tail Coverts: Violet, adding a striking accent. Lower Tail Coverts: Dark blue-green, harmonizing with the lower body. Tail Feathers: Predominantly dark blue-green, with secondary feathers featuring a bright yellow-orange dot pattern at the center, partially surrounded by a black zone.

Legs : Gray, providing a natural, understated look. Nails: Darker gray than the soles, enhancing the overall balance of the bird's appearance.

Basic Characteristics of Double Dark Blue1Blue2 Fischer's Lovebird Mutation

The Double Dark (DD) Blue1Blue2 mutation results from the combination of the Blue1Blue2 mutation with a double dark factor. This creates a significantly darker phenotype compared to the single dark factor D Blue1Blue2.

Head Forehead: Bright yellow-orange, providing a strong contrast. Crown: Gray with a bright yellow background, fading toward the nape.

Cheeks: Light yellow-orange with a gray transition zone blending into the yellow neck, extending to the center of the eye for a soft gradient effect. Front Body Chin, Throat, and Upper Chest: Light yellow-orange, offering a soft but bright appearance. Eyes: Dark brown with white, featherless eye rings, creating a sharp expression. Beak: Lighter pink than the wild type, enhancing its delicate look.

Lower Body Lower Chest, Sides, Abdomen, and Anal Region: Deep DD blue-green, giving the bird a rich, bold appearance. Wings and Back Coat and Wing Feathers: Darker than the rest of the body, adding a strong contrast. Primary Flight Feathers: Outer feathers are DD blue-green, while the inner feathers combine DD blue-green and black.

Wing Notch: Bright yellow, providing a striking accent. Tail Lower Back and Upper Tail Coverts: Gray, adding an elegant neutral touch. Lower Tail Coverts: DD blue-green, seamlessly matching the lower body.

Tail Feathers: Predominantly DD blue-green, with secondary feathers featuring a bright yellow-orange dot pattern in the center, partially surrounded by a black zone, giving the tail an artistic touch. Legs

Legs: Gray, complementing the bird’s overall color scheme. Nails: Darker gray than the soles, completing the refined appearance. This revised version enhances readability while maintaining scientific accuracy and clarity. Let me know if you need further refinements!