What Is the Highest Altitude Ever Recorded for a Bird?

On November 29, 1973, a Rüppell’s griffon vulture collided with a commercial airliner at approximately 37,000 feet over Abidjan, Ivory Coast — the highest altitude ever recorded for any bird in history.

The Incident Over Abidjan

The collision shut down one of the aircraft’s engines, but the plane landed safely. What made this near-disaster scientifically remarkable was what the bird left behind: feather fragments lodged inside the damaged engine. Those fragments became the key to one of ornithology’s most extraordinary identifications.

How Roxie Laybourne Cracked the Case

Smithsonian Institution feather expert Roxie Laybourne examined the microscopic structure of each barbule — the tiny branches that interlock along a feather’s shaft — and compared them against the Smithsonian’s vast reference collection of bird feathers. By 1974, she had a definitive answer: Rüppell’s griffon vulture (Gyps rueppelli). Laybourne’s forensic feather analysis, a field she helped pioneer, transformed what could have been a forgotten accident report into the confirmed world record for avian altitude.

Why Was a Vulture at Cruising Altitude?

Rüppell’s vultures are built for extreme height. They ride powerful columns of rising warm air called thermals, which allow them to soar with minimal energy expenditure while scanning hundreds of miles of African landscape below for carrion. The species has been regularly observed at altitudes exceeding 20,000 feet — but the 1973 incident revealed they can go far higher than anyone had documented.

The key is in their blood. Rüppell’s vultures carry a specialized form of hemoglobin with an unusually high oxygen affinity. This adapted hemoglobin binds oxygen molecules far more efficiently than the hemoglobin found in most mammals and many other birds, allowing the vulture to extract enough oxygen from the vanishingly thin air at jetliner altitude — air so oxygen-depleted that most animals would lose consciousness within seconds.

Built for the Extreme

With a wingspan reaching up to about 8.5 feet, the Rüppell’s griffon is one of the largest vultures in Africa and one of the most physiologically specialized birds on Earth. Its adaptations extend from molecular biology to anatomy: broad wings engineered to catch thermals, a bare head suited to reaching inside carcasses, and eyesight sharp enough to spot food from altitudes most creatures will never reach.

The combination of thermal soaring and high-efficiency hemoglobin means the Rüppell’s vulture has effectively conquered the vertical dimension of its environment. The 37,000-foot record is not a fluke — it is the outer edge of a biological system fine-tuned by millions of years of evolution.

A Record Held by a Critically Endangered Species

The irony is difficult to ignore: the highest-flying bird ever confirmed is now one of the most threatened. The Rüppell’s griffon vulture is listed as Critically Endangered on the IUCN Red List, with its population estimated to have declined by more than 90% over three generations. The primary threats are poisoning — often from carcasses laced with toxins by poachers trying to prevent vultures from alerting authorities — along with habitat loss, hunting for the bushmeat trade, and accidental poisoning from veterinary drugs.

The 1973 altitude record still stands. No bird has been confirmed higher. Whether the species itself will survive long enough for that record ever to be challenged remains an open and sobering question.