Worldwide Mutation Encyclopedia

The wild-type budgerigar of the Australian outback. Bright grass-green body, black-barred yellow mask and head, six throat spots.

The first colour mutation kept in captivity. A white ground replaces yellow, yielding a clear sky-blue body.

A single dark factor on a blue base produces deep, saturated cobalt.

Two dark factors on a blue base. A dusky, greyish-violet shade.

A single dark factor on a green base produces rich laurel green.

Two dark factors on a green base.

All melanin removed. A pure buttercup yellow bird with red eyes and white cheek patches.

Ino expressed on a blue background — a pure white bird with red eyes.

Black melanin is converted to a soft brown, softening all markings.

Removes the dark barring on the head and creates a V-shape of clear body colour on the back.

Inverts wing markings to a bright body colour with dark thumbprint edges.

Irregular clear (yellow/white) patches breaking up the normal pattern.

Heavily pied with dark eyes (no white iris ring) and randomised patches of clear ground.

Body retains full colour, wings become almost pure yellow or white.

Half-strength melanin: pastel body colour and grey wing markings.

Body and wing melanin both heavily reduced — a soft pastel bird.

Cinnamon + ino crossover on the Z chromosome — yellow or white body with cinnamon-brown lacework.

Yellow facial mask on an otherwise blue-series bird, body remains blue.

Yellow leaches into the body colour producing a turquoise or sea-green appearance.

Replaces blue/green body with grey (on blue base) or grey-green (on green base).

Modifier that shifts blue tones toward purple. Most visible on cobalt (single-factor violet cobalt = visual violet).

Forms a tuft, half-circle or full crown of feathers on the head.

Charcoal-black body colour on blue series; rare modifier, especially striking in double factor.

Reduces melanin only on the wings and back, leaving a clean 'saddle' pattern.

Body colour reduced to almost yellow/white while wings retain dark markings.

Combination of opaline, clearwing, and yellowface II — sea-green body fading to soft yellow wings.

Selectively bred for ~50% larger body, full mask, broader head, dropped pose. Not a colour mutation.