For counter-drone engineers, nature can provide valuable lessons. For example, a falcon does not hold the same shape when it accelerates, pursues prey and brakes and a hummingbird teaches us that maneuverability can matter as much as straight-line speed. Instead of designing an interceptor around a single aerodynamic shape, what can we learn from animals that change how they move as the mission changes? That question framed Dr. Alain L. Bujold’s presentation, “Nature-Inspired Innovation for Future Counter-UAS Systems” at the recent Counter-UAS Accelerator event in North Dakota and offers a novel direction for research.
Biomimicry for Counter-Drone Technology: Borrow the Function, Not the Animal
The central idea of Bujold’s discussion of biomimicry was to study how nature performs a function, not to build a mechanical bird. Identify the underlying mechanisms and translate those mechanisms into engineering, he said. The objective is to understand what makes a bird effective, then determine which principles might improve a machine. As founder and chief scientist of Bujold Innovation LABS19 LLC focused on interceptor drones, Bujold has been exploring how biological principles could inform their shape, propulsion, maneuverability and energy use.
Giving an aircraft birdlike wings does not automatically give it a bird’s flight capabilities, he warned. A useful investigation must examine geometry, movement, structure and interactions with the surrounding environment. It must also connect those observations to a specific operational requirement.
For an interceptor drone, that requirement might involve closing distance quickly, making a sharp correction during pursuit or conserving enough energy to complete an engagement. Each problem calls for a different biological lesson.
Bujold organized his discussion around four inspirations: the falcon for speed, the owl for quiet flight, the hummingbird for maneuverability and the kingfisher for geometry. Rather than proposing that engineers reproduce any one animal, he suggested combining selected principles within a purpose-built system.
That changes the starting question. Instead of asking, “How do we make this drone look more like a falcon?” designers would ask, “Which changes in a falcon’s geometry support different phases of flight, and which could translate into an interceptor?”
Falcon-Inspired Interceptor Drones: Designing for Different Flight Phases
Bujold’s falcon example illustrates why a static picture can mislead an engineer. A bird photographed with its wings extended may be slowing down rather than maximizing speed. Its posture during a dive presents a different arrangement of wings, tail and body. Studying only one configuration could mean borrowing the wrong geometry for the intended task.
Bujold proposed examining multiple postures and considering how an interceptor might transition between configurations. One shape could favor rapid approach, while another could support maneuvering or deceleration. He described this as a possible adaptive system, not a demonstrated capability. That difference matters because interception is not simply a race. An aircraft that closes distance must still position itself effectively relative to its target. Bujold’s proposal asks engineers to consider the full sequence rather than optimize the vehicle for one moment within it.
Doing this introduces a practical tradeoff. Changing geometry adds complexity. Bujold acknowledged that cost and customer requirements would influence whether a design used deployable surfaces or a simpler fixed configuration. Nature may supply the inspiration, but operational priorities will ultimately determine which ideas deserve development.
Hummingbird Maneuverability and Owl-Inspired Quiet Flight
Whereas the falcon provides a model for speed and changing posture, the hummingbird supplies a prompt for rapid directional control. Bujold suggested investigating small deployable surfaces inspired by hummingbird wing geometry. In his conceptual example, an interceptor could use such a surface to make a quick change in direction while pursuing another drone. He emphasized adapting the principle rather than copying the animal’s movements outright.
The owl took the discussion from the vehicle’s overall shape to much smaller features. Bujold pointed to fine-scale feather geometry as an inspiration for managing airflow and reducing noise. His broader argument was that engineers should investigate both the visible form of a system and the small structures that influence its behavior. A streamlined airframe addresses only part of that problem.
He also invoked shark skin as another example of looking beyond an animal’s outline to examine surface features and their interaction with fluid flow. In Bujold’s proposed research approach, these observations would guide questions about engineered surfaces rather than establish that a particular texture would improve a drone.
These nuanced distinctions keep the technology discussion grounded. Biological inspiration identifies something worth testing. It does not establish the performance of a manufactured substitute.
Geometry, Propulsion and Energy: A Whole-System Counter-UAS Approach
Bujold framed interceptor development around three connected areas: propulsion, vehicle shape and power supply. His emphasis on “mitigation through geometry” extends beyond making an aircraft more streamlined. Shape, structure and orientation can influence how a system manages physical effects. In his presentation, he applied that perspective to airflow, propulsion, vibration and the integration of other components.
Propellers formed one part of that discussion. Bujold proposed exploring different geometries and arrangements, including combinations of pushing and pulling propulsion. He presented these as possible research directions for improving speed or energy use.
The useful takeaway is the connection among the components. An aerodynamic change cannot be judged entirely apart from the propulsion system that drives the aircraft. An added control surface must justify its weight and complexity. A payload becomes part of the vehicle’s geometry, not merely an attachment.
Bujold’s approach treats the interceptor as an interacting system. The objective is not to collect nature-inspired features. It is to determine whether those features work together to improve the mission.
Simulation and Testing: Turning Biological Inspiration Into Engineering
Observation starts the process, but analysis must carry it forward. Bujold described using engineering software, including COMSOL, to examine vibration and resonance alongside more conventional aerodynamic work. He argued that studying how geometry affects those behaviors could reveal opportunities that an assessment focused only on external airflow might miss.
That emphasis connects the presentation’s most imaginative ideas to its engineering methodology. A promising biological feature needs more than an appealing analogy. Designers must translate it into a manufacturable structure, evaluate its behavior and determine whether the resulting system performs better.
Because the presentation did not provide interceptor flight-test data, measured acoustic reductions, endurance improvements or demonstrated interception outcomes, its proposals remain concepts and research directions. Those limitations do not diminish the value of the approach. It defines the work ahead. Fielded biomimetic aircraft already exist, but none yet flies the interceptor mission. That gap is where Bujold’s focus lies. In the end, falcon-inspired geometry, owl-inspired surfaces and hummingbird-inspired control concepts become meaningful counter-UAS technologies only when engineering evidence supports them.
A Fielded Case-In-Point: RoBird and the Biomimetic Flapping Wing
Bujold’s presentation describes a direction. A Canadian company, AERIUM Analytics, already flies an aircraft that sits close to it. RoBird is an ornithopter; a remote-controlled drone with a one-metre wingspan and a mass of roughly 900 grams that flaps its wings instead of turning a propeller. AERIUM describes it as a system engineered to mimic the behaviour and responses of an actively hunting peregrine falcon, down to the wing-beat frequency other birds use to judge how aggressively a predator is moving. The company acquired the technology and its patents in 2020 and manufactures the units in Calgary, Alberta Canada.
The mission differs from Bujold’s. RoBird’s job is wildlife management, not drone interception. It establishes a perceived predatory range over airfields, farmland and industrial sites and prompts flocks to relocate. AERIUM reports deployments at Edmonton International Airport dating to 2017, thousands of flights and a measurable reduction in damaging bird strikes. It is an interceptor of sorts but more importantly, it is evidence for a narrower proposition that the presentation alludes to, that a flapping-wing, bird-shaped aircraft can be manufactured, certified, flown repeatedly and operated commercially rather than remaining a laboratory concept. As such, it can also inform future research directions.
RoBird’s mass, wing flexibility and control surfaces are tuned to a specific behavioural response in a specific target species. This is the same logic Bujold applies when he asks which falcon geometry serves which phase of flight. And AERIUM now offers the aircraft in two configurations, a flapping-wing model built for presence and a fixed-wing model built for speed and endurance. This implicitly acknowledges that one airframe may not serve every task.
Those limits are worth emphasizing. RoBird pursues birds that manoeuvre slowly and predictably. A hostile quadcopter does not. Whether the same platform logic scales to interception remains unproven, and no one has yet flown the interceptor mission with a bird-shaped airframe. What RoBird establishes is that the translation Bujold describes has already survived contact with manufacturing, regulation and daily operation. The question is whether its principles can be aimed at a harder target.
The Future of Biomimetic Counter-UAS Systems
Even so, Bujold’s presentation offered its strongest insight not in a particular drone configuration, but in a way of asking questions. Why optimize an interceptor around one posture when its mission involves several different kinds of movement? Why study only the airframe’s outline when smaller surface features may influence its behavior? Why assess geometry separately from propulsion, vibration and energy use?
Those questions invite engineers to look beyond familiar design assumptions without abandoning practical constraints. Nature is not a ready-made blueprint for a counter-drone system. In Bujold’s proposed methodology, it is a source of mechanisms to investigate, adapt and test. The opportunity lies in identifying which biological principles can survive that translation from observation to simulation, prototype and operational performance.
The next nature-inspired interceptor may not resemble a bird at all. Or it may resemble one almost exactly, as RoBird already does, as a case that sits at the far end of the spectrum from abstraction. Its biological influence could appear in how it changes shape, manages airflow or responds during pursuit. For counter-UAS developers, that compelling prospect involves learning useful engineering lessons from living systems, even if a platform like RoBird shows the two are not mutually exclusive.