Albino Animal

In some animals albinism-like conditions may affect other pigments or pigment-production mechanisms:
• "Whiteface" a condition that affect some parrot species is caused by a lack of psittacins.
• Axanthism is a condition common in reptiles and amphibians, in which xanthophore metabolism is affected rather than synthesis of melanin, resulting in reduction or absence of red and yellow pteridine pigments.
• Leucism differs from albinism in that the melanin is, at least, partially absent but the eyes retain their usual color. Some leucistic animals are white or pale because of chromatophore (pigment cell) defects, and do not lack melanin.