Godwits are real high-fliers
The Dutch national bird, the black-tailed godwit, spends more than 20% of its migration flying time at very high altitudes en route to its West African wintering grounds. Altitudes of at least five kilometres and sometimes nearly six are not unknown. This has been revealed by new research, published this week in the Royal Society Journal Proceedings B, by Dr Nathan Senner of the University of Groningen / University of Montana and his team. The results are amazing because godwits are true lowland birds. They should lack the physiological adaptations needed to fly at altitudes where the partial pressure of oxygen is less than 50% of that at sea level, particularly to the red blood cells. Only the geese that migrate over the Himalayas ought to be able to do this.
In this remarkable study, postdoc researcher Nathan Senner and colleagues from the UG and the University of Amsterdam used GPS trackers to measure the flying altitudes and wing beat frequency of migrating godwits. The data were combined with information about wind, temperature and air pressure. In addition to the noticeably long periods of time that godwits fly at high altitudes, the fact that they do this despite there being no topographical barriers to cross stands out. The very high flying altitudes may be related to avoidance of high air temperatures at lower levels. Godwits also benefited from more tailwinds at higher altitudes.

Sport performance
Nathan Senner: ‘Nearly 20% of all birds annually migrate long distances between their breeding grounds and their wintering grounds. These treks require legendary “sport performances” – performances that turn our ideas about the limits to endurance and physiology upside down. Take the treks by bar-tailed godwits across the Pacific Ocean, 11,000-12,000 kilometres non-stop from Alaska to New Zealand. And what about the treks by geese over the Himalayas. Our own godwits had even more surprises in store for us, though!’
Revised ideas
Thanks to these results, migratory bird biologists have had to revise their general ideas about the frequency of high altitude flying. Lowland birds have a greater capacity to fly high than they considered even possible. Flights at high and extremely high altitudes are probably a lot less unusual than we’ve always thought.
Last modified: | 16 July 2018 2.51 p.m. |
More news
-
05 September 2025
Kottapalli nominated for the Huibregtsen Prize 2025
Prof. Ajay Kottapalli of the University of Groningen has been nominated for the prestigious Huibregtsen Prize.
-
29 August 2025
Top Dutch Solar Racing stranded just before the finish line, but returns proudly
From August 24 to 31 this year, the student team Top Dutch Solar Racing will participate in the Bridgestone World Solar Challenge. This page will keep you up to date on the latest developments during and around the race.
-
21 August 2025
Upconversion nanoparticles to aid the application of molecular motors
Scientists from Groningen University and the University of Amsterdam have developed upconversion nanoparticles to assist in powering molecular motors.