An albino bird has a white beak, white plumage, non-coloured skin, white talons and pink or red eyes. Albinism is only seen in about 1 of every 1,800 birds. The two most common species of albino birds are the common house martin and the American robin. Famous albino birds include "Snowdrop", a Bristol Zoo penguin.In one study, albinism in birds has been categorised according to the extent of pigment absence. –

Total albinism – a simultaneous complete absence of melanin from the eyes, skin, and feathers. This is the rarest form. Only 7% of 1,847 cases of avian albinism examined was this type. Incomplete albinism – when melanin is not simultaneously absent from the eyes, skin and feathers. Imperfect albinism – when melanin is reduced in the eyes, skin and feathers. Partial albinism – when albinism is localized to certain areas of the body.However, it has been argued that the definition of albinism precludes the possibility of "partial albinism" in which a mostly white bird shows some form of melanin pigmentation. "It is simply impossible, just like being partially pregnant. In fish
As with other animals, it has been stated that for fish to be properly described as "albino", they must have a white body and pink or red eyes. Artificially selected
Zebrafish have three types of chromatophores—iridophores, melanophores, and xanthophores—which produce silver, black, and yellow pigmentation respectively. Zebrafish that lack iridophores are known as roy mutants, those that lack melanophores as albino mutants, and those which lack both melanophores and iridophores are ruby mutants.
This is in contrast with mammals, some of which have mutations that show no tyrosinase or DOPA oxidase activity in albinos. The albino phenotype of the pond frog (Pelophylax nigromaculatus) has been attributed to one of three mutations that created a dysfunctional tyrosinase. Two of those mutations involve an insertion of a thymine (T), a frameshift mutation, resulting in a truncated isoform of the TYR protein that is defective. The other mutation involves the deletion of a codon, three nucleotides that code for a lysine (Lys). In the wrinkled frog (Glandirana rugosa) and in the rice frog (Fejervarya kawamurai), a substitution from a guanine (G) to an adenine (A) creates a missense mutation, in which a glycine (Gly) changes to an aspartic acid (Asp) and an arginine (Arg), respectively. These changes in the polypeptide chain causes a dysfunctional tyrosinase. In invertebrates
Albinism in molluscs has been recognized to be a hereditary phenomenon at least since 1900. Albinism in molluscs can exist to a variable degree. Sometimes an individual snail has a normally pigmented body, but the shell is completely without the normal pigmentation because of a defect in the cells of the mantle. Shells of certain mollusc species can be translucent when they lack the normal pigmentation. In insects
The neurohormone [His7]-corazonin induces darkening of the cuticle of Locusta migratoria. The Okinawa strain of this species is deficient in [His7]-corazonin and is albino. One of the typical features of Locusta migratoria is that they are gregarious locusts.