The Yellow Cardinal with a 1 in a Million Genetic Mutation

Quick Take

• A yellow cardinal's rarity has to do with an uncompleted metabolic process. Explore the real reason →
• What a cardinal eats determines whether it ever turns red at all. See how diet decides color →
• The yellow cardinal in that viral video isn't actually a yellow cardinal, and the distinction matters more than you'd think. Spot the key distinction →

In the birding community, cardinals are a joy to watch. They’re vocal and powerful, and they don’t spook easily, making them frequent visitors to bird feeders. Their bright red plumage is beloved among birders and makes them one of the easiest birds to identify. But that vibrant shade isn’t the only cardinal color.

On rare occasions, yellow Northern cardinals have been spotted. Due to their extreme rarity, they are considered the unicorns of the bird world. It takes a lucky twist of fate and a keen eye to observe one of these special birds. Their coloring is so unusual that they almost don’t look real. One fortunate birdwatcher found the odds in their favor and was able to capture the unique specimen on video, later posting the footage on Instagram. But just how likely are you to come across a yellow cardinal in nature?

A Million To One

The odds of seeing a yellow cardinal aren’t just slim. In reality, they’re practically nonexistent. Researchers estimate that yellow cardinals occur in roughly one out of every million individuals, making the chances of spotting one rarer still. The unique coloring of these birds comes from an interesting genetic mutation.

Cardinals get their signature red color from eating foods containing yellow carotenoid pigments. Their bodies convert these yellow pigments into red through a metabolic process. In extremely rare cases, a genetic mutation prevents that conversion. As a result, the bird develops bright yellow plumage. This genetic condition is known as xanthism.

Uncommonly, a yellow cardinal can result without the genetic mutation, simply due to lack of nutrients. Cardinals unable to find enough carotenoid-rich foods will not undergo the pivotal color change.

Not to Be Confused With a True Yellow Cardinal

The bird in the Instagram video is a rare specimen of the Northern cardinal. However, the yellow cardinal is a bird native to South America. This species is truly yellow, requiring no genetic mutation to maintain its bold feathers. It is the only member of the genus Gubernatrix, which makes it rare in its own right. Unlike the Northern cardinal, this bird belongs to the Thraupidae family.

Sadly, the true South American yellow cardinal (Gubernatrix cristata) is currently listed as Endangered. It faces threats from illegal trapping and habitat loss, which have caused a steep decline in its population. South America’s yellow cardinal is prized for its beautiful plumage, making it highly sought after by bird collectors. Unfortunately, this has pushed the species to the brink of near-extinction, making them a rare sight in the wild.