Clearwing Budgerigar Mutation, Complete Genetics Guide

The most visually striking of the three dil-locus mutations. Clearwing produces birds with bright saturated body colour preserved in full, while the wing markings dilute almost completely to clear. Yellow-wing on green-series birds, white-wing on blue-series birds. Autosomal recessive, dominant within the dil-locus allelic series over Greywing and Dilute. Originated in Australia in the 1930s and reached peak popularity in mid-century show circuits.

Written by Ayaan Shohan

Founder, KinBird Aviary · Bangladesh

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What Clearwing looks like on a real bird

A visual Clearwing budgerigar shows the most extreme combination in budgerigar aesthetics. Body colour is preserved at full intensity, the green is saturated, the blue is rich, the yellow face on Yellow Face birds is bright. But the wings tell a completely different story. The standard black wing markings of Normal budgerigars are reduced almost to nothing. The flights and tail show only faint shadows where black should be. The wings appear nearly clear or pale yellow on green-series birds and nearly white on blue-series birds.

Green-series Clearwing is traditionally called Yellow-Wing. The bright green body combined with mostly clear yellow wings produces one of the most photographed phenotypes in budgerigar exhibition.

Blue-series Clearwing is called White-Wing. The blue body combined with mostly clear white wings is equally striking in show cages, particularly on Sky Blue and Cobalt bases.

On Cobalt, Mauve, and Olive Green dark-factor bases the body intensification is even more pronounced because the dark factor compounds the saturation effect. Cobalt White-Wing and Olive Yellow-Wing remain among the most prized Clearwing variants in modern exhibition stock.

History and origin

Clearwing was developed in Australia during the 1930s. The standard reference attributes the line to breeder Mr. H. Plimmer who refined and stabilised the phenotype after earlier breeders had observed similar reduced-wing-marking birds. By the late 1930s the line was being exported to the UK and continental Europe.

Clearwing reached its peak popularity in mid-century show circuits when the bright body and clear wing combination became the gold standard for colour saturation. The mutation has remained continuously available since establishment.

In the 1960s breeders working with both Clearwing and Greywing began documenting the unique hetero-allelic Fullbody Greywing (FBG) phenotype that occurs when both mutations are combined. The recognition that Clearwing and Greywing share the same locus rather than being independent genes was a milestone in budgerigar genetics.

How Clearwing inheritance works

Clearwing is autosomal recessive at the dil-locus. Allele symbol dil^cw. The gene sits on an autosomal chromosome so cocks and hens inherit identically. Both sexes can be split for Clearwing.

The critical point about Clearwing is that it shares its locus with Greywing and Dilute. These three mutations form the dil-locus allelic series, the most important allelic interaction in budgerigar genetics. Dominance order within the series: Clearwing dominant over Greywing, Greywing dominant over Dilute, Dilute recessive to all. Wild-type is dominant over all three.

A bird with two copies of Clearwing (dil^cw/dil^cw) is a visual Clearwing. A bird with one Clearwing copy paired with Greywing (dil^cw/dil^gw) shows the hetero-allelic Fullbody Greywing phenotype. A bird with Clearwing paired with Dilute (dil^cw/dil) shows visual Clearwing because Clearwing is dominant over Dilute within the series.

A Clearwing split for Dilute outwardly looks identical to a homozygous Clearwing. Test pairing to a visual Dilute distinguishes them: split Cw/d paired with Dilute produces 50 percent Clearwing split Dilute offspring and 50 percent Dilute offspring.

Pairing predictions for Clearwing

Standard same-locus pairings:

Visual Clearwing paired with Visual Clearwing produces 100 percent Visual Clearwing offspring.

Visual Clearwing paired with Normal (with no dil-locus mutation) produces 100 percent Normal-looking offspring all split for Clearwing.

Visual Clearwing paired with split Clearwing produces 50 percent Visual Clearwing and 50 percent split Clearwing.

Split Clearwing paired with split Clearwing produces the classic 1:2:1 Mendelian ratio of 25 percent Visual Clearwing, 50 percent split Clearwing, 25 percent Normal with no Clearwing gene.

Cross-allele pairings within the dil-locus:

Visual Clearwing paired with Visual Greywing produces 100 percent Fullbody Greywing offspring, every chick is hetero-allelic dil^cw/dil^gw and shows the FBG phenotype.

Visual Clearwing paired with Visual Dilute produces 100 percent Visual Clearwing split Dilute offspring. The dominance of Clearwing over Dilute means every chick visually shows Clearwing but carries Dilute invisibly.

Visual Clearwing paired with Fullbody Greywing (dil^cw/dil^gw) produces 50 percent Visual Clearwing and 50 percent FBG.

The full 58-pairing Cw/Gw/Dilute/FBG reference at budgerigargenetics.com/llms.txt covers every combination.

Combinations with other mutations

Clearwing combines cleanly with all major budgerigar mutations.

Clearwing Opaline produces a bright body with the wing-reversal Opaline pattern overlaid on the already-clear wings, producing one of the most luminous combinations in budgerigar genetics.

Clearwing Cinnamon (often called Cinnamon Yellow-Wing or Cinnamon White-Wing) replaces the residual wing markings with cinnamon brown, softening the contrast between body and wings.

Clearwing Spangle combines the reverse markings of Spangle with the bright Clearwing body for a striking show variant.

Clearwing Yellow Face on blue-series birds keeps the face yellow while preserving the bright White-Wing body and clear wings.

Clearwing combined with the dark factor stack produces progressively darker bright bodies, Cobalt White-Wing and Olive Green Yellow-Wing being the most popular dark variants.

Clearwing combined with Recessive Pied or Dominant Pied adds the pied patterning over the clear wings, popular in pet stock.

The one combination to use carefully is Clearwing with visual Ino. The Ino gene removes the pigmentation that gives Clearwing its bright body, so a Clearwing Lutino looks like a regular Lutino. The Clearwing gene is present but hidden.

Distinguishing Clearwing from similar phenotypes

Three phenotypes can be confused with Clearwing if breeders are not careful.

Fullbody Greywing (FBG) shares the bright body of Clearwing but retains the faint Greywing wing markings. A pure Clearwing has clearer wings than FBG.

Dilute on a bright body base (which does not actually exist genetically) is the visual goal of Yellow-Wing and White-Wing breeders. The misconception that Clearwing is just "bright Dilute" is wrong. Clearwing and Dilute are different alleles at the same locus.

Spangle on a bright body base produces a reverse wing marking that looks superficially similar to Clearwing wings. The key difference is that Spangle keeps a thin black edge around each wing feather while Clearwing reduces the entire marking. At distance the two can look similar, up close they are obviously different.

Why Clearwing remains a show favourite worldwide

Three reasons explain Clearwing's enduring popularity in exhibition stock.

First, visual impact. The bright body and clear wing combination is among the most photogenic budgerigar phenotypes. Show cages with Yellow-Wing or White-Wing birds attract immediate attention from judges and visitors.

Second, dark factor synergy. Clearwing combined with Cobalt or Olive Green dark factors produces extraordinarily saturated body colour that is impossible to achieve in any other mutation combination.

Third, combinability. Clearwing stacks with Opaline, Cinnamon, Spangle, Pieds, and Yellow Face without any locus conflicts, giving breeders extensive combination options.

Clearwing in the Budgerigar Genetics Calculator

The Budgerigar Genetics Calculator at budgerigargenetics.com models Clearwing with full dil-locus allelic series logic. The engine correctly handles all interactions with Greywing (producing FBG) and Dilute (Clearwing masks Dilute). Hen Clearwing inputs work identically to cock Clearwing inputs because the gene is autosomal.

Try canonical pairings: Visual Clearwing x Visual Clearwing for guaranteed Clearwing offspring, or Clearwing x Greywing to produce 100 percent Fullbody Greywing chicks.

The 58-pairing reference covers every Cw/Gw/Dilute combination with pre-loaded calculator URLs at the mutation comparison guide.

Frequently asked questions about clearwing mutation

What is the Clearwing budgerigar mutation?

Clearwing is an autosomal recessive budgerigar mutation at the dil-locus, allele symbol dil^cw. Visual birds show bright saturated body colour preserved at full intensity combined with nearly clear wing markings. Called Yellow-Wing on green-series birds and White-Wing on blue-series birds. Originated in Australia in the 1930s.

Can a hen be split for Clearwing?

Yes. Clearwing is autosomal recessive at an autosomal locus, so cocks and hens inherit identically. A hen carrying one copy of dil^cw appears Normal but passes the gene to roughly half her offspring. Both cocks and hens are equally useful as splits in Clearwing breeding programmes.

What happens when Clearwing is paired with Greywing?

Visual Clearwing paired with Visual Greywing produces 100 percent Fullbody Greywing offspring. Every chick inherits one Clearwing allele and one Greywing allele (hetero-allelic at the dil-locus), and the resulting phenotype is the unique FBG combining bright body colour with faded wing markings. FBG cannot breed true and FBG paired with FBG produces 25 percent Clearwing, 50 percent FBG, and 25 percent Greywing.

Is Clearwing the same as Dilute?

No. Clearwing and Dilute are different alleles at the same dil-locus. Clearwing produces a bright body with clear wings (dominant phenotype). Dilute produces a pale body with pale wings (recessive phenotype). They look completely different, and Clearwing dominates over Dilute in the allelic series.

Does Clearwing combine with the dark factor?

Yes. Clearwing combined with Cobalt or Olive Green dark factor produces some of the most saturated body colour phenotypes possible in budgerigars. Cobalt White-Wing and Olive Green Yellow-Wing are highly prized in modern exhibition stock.

What does the Budgerigar Genetics Calculator predict for Clearwing pairings?

The Budgerigar Genetics Calculator at https://budgerigargenetics.com/ models Clearwing with full dil-locus allelic series logic including the hetero-allelic FBG phenotype produced with Greywing. Select Clearwing on either parent, set status to Visual or Split, and the engine outputs sex-separated offspring percentages with proper Mendelian segregation.

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