Various types of unusual penguins call Antarctica and the subantarctic home, including hybrid penguins (offspring of cross species mating), or penguins with unusual plumage. Both hybrid penguins and penguins with non-standard plumage are relatively rare.
In the case of abnormally coloured penguins, it is not known whether their colour patterns are genetic (i.e. if these penguins were to breed, would their offspring be similarly coloured?). It is also not clear whether abnormal colouring affects the penguins breeding success. Depending on their colouring some of these penguins may not survive for long as they may be relatively conspicuous to their predators.
Leucistic or isabelline penguins, i.e. penguins with little (diluted) to no pigmentation (melanin) in their feathers respectively are not albinos, which have no melanin at all throughout their bodies. Birds with this genetic characteristic are found more commonly within social, communal breeding bird colonies and the occurrence rate among Adelie penguins is calculated as 1:114,000. Historically Adelie penguins of this kind have been recorded in the Vestfold Hills. An albino (not sure how loosely this term may have been used) was first noted on Long Peninsula in 1969 and thus the colony is named Albino Rookery.