A robotic bird inspired by one of nature’s most skilled fliers is helping scientists understand how birds stay stable in strong winds.
The research could lead to a new generation of small drones that can fly more safely and smoothly in turbulent weather.
The project is a collaboration between researchers at RMIT University in Australia and the University of Bristol in the United Kingdom.
Their findings were published in two studies in the Journal of the Royal Society Interface.
The research focuses on the nankeen kestrel, a small bird of prey that is famous for its ability to hover almost perfectly still in the air, even when strong winds are blowing.
While many drones struggle or must stay on the ground during rough weather, kestrels continue flying with remarkable control.
Scientists believe learning from these birds could help improve small unmanned aerial vehicles, also known as drones. These aircraft are widely used for aerial photography, search and rescue, farming, environmental monitoring, and package delivery. However, their performance often drops sharply when wind conditions become unstable.
Climate change is expected to increase the frequency of turbulent weather in many regions, making it even more important to develop aircraft that can handle rough air safely.
To better understand how kestrels achieve such stable flight, the research team first observed live birds inside RMIT’s large industrial wind tunnel. Using advanced motion-capture technology, they recorded the birds’ movements while flying in gusty and turbulent conditions.
The researchers discovered that kestrels do not rely on just one trick to stay balanced. Instead, they constantly make tiny adjustments with their wings, tails, and body. Their flexible feathers and joints also help absorb sudden changes in airflow. At the same time, the birds can quickly sense changes in the wind and react almost instantly to maintain control.
To study these movements in even greater detail, the team built a robotic bird that could copy the kestrel’s most important flight motions. Unlike a real bird, the robot allowed researchers to carefully measure the forces acting on the wings and body during different movements.
The experiments revealed several unique flight techniques that help kestrels remain steady in difficult conditions. These natural strategies could one day improve the stability and maneuverability of drones that face similar challenges in the air.
The researchers say the project is a good example of how studying nature can inspire better engineering solutions. Instead of inventing new technologies from scratch, engineers can learn from animals that have already evolved highly effective ways to solve difficult problems.
The team now plans to investigate another important skill of kestrels—how they sense changes in the air before turbulence becomes a problem. By understanding how birds detect and respond to small wind disturbances, the researchers hope to create smarter flight systems for future drones.
Although the research is currently focused on small drones, the scientists believe that some of these ideas could eventually be adapted for larger aircraft, helping make air travel safer, smoother, and more efficient in the years ahead.
