Why leucism and albinism are not the same

An all-white monocled cobra recently circulated widely online, described in many captions as albino. According to the Yahoo article reporting on the snake, that description was wrong.\n\nThe animal displayed leucism — a condition that reduces all pigmentation across the skin, scales, or feathers, but leaves the eyes their normal colour. Albinism, by contrast, is caused specifically by the absence or near-absence of melanin, the pigment produced by cells called melanocytes. The article notes that animals with albinism typically show pink or red eyes, because blood vessels become visible through unpigmented tissue.\n\nThe distinction is biological, not cosmetic. Leucism affects the distribution of pigment cells during development. Albinism affects the cells' ability to produce melanin at all, the article explains. A leucistic animal may retain patches of normal colour; an animal with albinism will not.\n\n## Why the confusion persists\n\nBoth conditions result in animals that appear pale or entirely white, which is why the terms get used interchangeably in casual reporting. The Yahoo piece argues that the mix-up is common precisely because the visual result can look similar at a glance. But the underlying genetics, the cellular mechanisms, and the health implications differ between the two.\n\nIn people, albinism is associated with specific effects on vision — including nystagmus, photophobia, and reduced visual acuity — because melanin plays a role in the development of the optic pathways, not only in skin and hair colour. Leucism does not carry those same consequences.\n\nFor the albinism community, the confusion has a cost beyond biology. When the word