Andean Condors Can Stay Aloft For Hours Without Flapping Wings


Despite their massive size Andean condors can remain aloft for hours while expending little energy (Pedro Szekely / CC BY-SA-2.0/

Andean Condors, which weigh between 20 to 30 pounds (9 to 13 kilograms) and boast a wingspan of more than 10 feet, are one of the world's heaviest and largest flying birds. Yet the majestic vultures, which spend their days circling the Andes mountains and nearby Pacific coasts of western South America in search of carcasses, manage to stay afloat for hours.

Though researchers have long suspected that the massive creatures conserved energy by using rising air currents to surf the skies, nobody had ever documented how infrequently the birds used their wings. Now, a new study has found that the incredibly energy-efficient condors use their wings just 1 percent of their time aloft – mostly during takeoff and landing. In comparison, ospreys and storks flap their wings 25 percent and 17 percent of the time, respectively, during their overland migratory flights.

"Condors are expert pilots, but we just had not expected they would be quite so expert," said study co-author Professor Emily Shepard, a biologist at Swansea University in Wales.

The researchers tagged the condors with flight recorders to monitor their movement (Credit: Emily Shepard)

The extensive research, conducted in Patagonia — a semi-arid plateau on the southernmost tip of South America — from 2013 to 2018, entailed attaching high-tech flight recorders to the birds' wings. Shepard and her team, in collaboration with Sergio Lambertucci, a biologist at the National University of Comahue in Argentina, often spent hours waiting for the magnificent animals to be lured in by strategically placed sheep carcasses and bones.

The information collected — 320 different data points per second — was too much to send back via the phone or satellite network. Hence, the researchers had to physically retrieve the devices, which were designed to fall off the birds after a week. While an embedded GPS tracker allowed the scientists to ascertain the recorders' exact locations, getting to them was no easy task given Patagonia's rough terrain and minimal infrastructure.

Bird researcher Orlando Mastrantuoni recovers a condor tag in the Andes mountains (Credit: Emily Shepard)

After losing seven recorders for every one they retrieved, the team shifted their focus to younger condors, who tend to hover over the communal roosts, which are located on gently rolling hills rather than the cliff tops frequented by adults. The 250 hours of flight data collected from eight juvenile condors revealed that the birds flew for an average of three hours but flapped their wings for less than two minutes of the time. One efficient aviator managed to cover 106 miles (172 kilometers) over five hours without a single flap!

The researchers, who published their findings in the journal PNAS on July 28, 2020, say the large fliers expend the most energy during takeoff. However, once in the air, they can soar for long periods of time without turning on their "engines." The scientists speculate that adult condors may demonstrate an even more impressive flight record than their younger counterparts.


Get the Workbook for this article!

Workbook contains: Article, Reading Comprehension, Critical Thinking Questions, Vocabulary in Context (+ answers), Multiple Choice Quiz (+ answers), Parts of Speech Quiz (+ answers), Vocabulary Game (+ answers)
Cite Article
  • imagination2009
    imagination2009Monday, September 14, 2020 at 11:23 am
    This is a big bird:P
    • lecykeka-160004938583
      lecykeka-160004938583Monday, September 14, 2020 at 9:41 am
      wow, what a big bird!
      • wolffan165
        wolffan165Monday, September 14, 2020 at 7:46 am
        Thats cool though i know very little about birds but really interesting and science is my favorite subject! :)
        • callott
          callottSunday, September 13, 2020 at 4:34 pm
          crickey mate!Thats a big big and a whooper of a story!
          • 4h_ta1_beast
            4h_ta1_beastSunday, September 13, 2020 at 3:05 pm
            So cool
            • 4h_ta1_beast
              4h_ta1_beastSunday, September 13, 2020 at 3:03 pm
              So cool it does not have to go flap flap flap
              • ilovefoxes101
                ilovefoxes101Friday, September 11, 2020 at 11:26 am
                i love this!
                • ihavenousername
                  ihavenousernameFriday, September 11, 2020 at 11:02 am
                  it looks like a teen vulture cause it has hair
                  • fireboy20
                    fireboy20Thursday, September 10, 2020 at 6:54 pm
                    wow i would like to have that power of flying long distance. probulay fun and realacing.
                    • besepicu-159777776914
                      besepicu-159777776914Thursday, September 10, 2020 at 1:54 pm
                      to me it looks like a eagle half turkey lol
                      • woofilovedogs
                        woofilovedogsSunday, September 13, 2020 at 4:36 pm
                        you can change your username in settings. Just saying :-).
                        • nonamewatermelo
                          nonamewatermeloFriday, September 11, 2020 at 11:15 am
                          yes, i think it does too! lol