How biological systems inspire sustainable design

Biomimetic design can be applied at different levels depending on how designers interpret and extract natural ideas. According to Bader et al. (2021) and Chayaamor-Heil (2023), biomimicry operates on three primary levels: organism, behavior, and ecosystem.

The organism level involves direct inspiration from a specific plant or animal. This might include replicating the entire organism or focusing on a particular structural or functional characteristic that can be applied to a design challenge. The behavior level focuses on how a living organism interacts with its environment. This includes studying adaptive actions, such as how particular species manage temperature, moisture, or movement to their surroundings. The ecosystem level takes a broader approach, drawing from the principles that allow ecosystems to function efficiently and sustainably. These include energy cycling, biodiversity, symbiotic relationships, and resilience.

Further refinement of biomimetic interpretation is found in the work of Mirniazmandan and Rahimianzarif (2017), who propose five sub-levels of imitation: form, material, construction, process, and function. These allow designers to isolate specific aspects of biological systems that may be relevant to the built environment. In addition, Oguntona and Aigbavboa (2023a) describe three conceptual approaches to working with bio-inspiration: imitation, emulation, and inspiration. These dimensions range from directly copying nature’s forms to drawing abstract ideas and applying them creatively to solve design problems.

A related concept that supports the shift toward nature-integrated design is biophilia. While not technically classified under bio-inspired design, biophilic design promotes the connection between humans and the natural world. Defined by Edward O. Wilson and Stephen Kellert, biophilia refers to the inherent human tendency to seek contact with nature. This concept is rooted in our evolutionary history and biological development. According to Calabrese (2015), biophilic design aims to restore this lost connection in modern environments by incorporating environmental features, natural forms, daylight, spatial variety, and local identity. These strategies contribute to spaces that support human wellbeing in cognitive, emotional, and physical dimensions.

In addition to biomimicry and biophilia, there is a growing interest in distinguishing between nature-based solutions (NbS) and nature-inspired solutions (NiS). Nature-based solutions are typically linked to living ecosystems and rely on their continued ecological functions to deliver water purification, carbon storage, or climate regulation benefits. In contrast, nature-inspired solutions, including biomimicry, are derived from principles and strategies observed in nature but do not require functioning ecosystems to work. As IUCN (2020b) outlined, NiS refers to innovative systems, materials, or processes designed using insights from biology, enabling scalable applications in architecture and engineering.

Applying biomimetic design allows us to view nature not just as a source of beauty or inspiration but as a source of knowledge and innovation. By translating natural strategies into architectural systems, designers can create buildings and infrastructures that are regenerative, adaptive, and resilient. The following table presents selected examples of biological systems and their corresponding architectural applications, demonstrating how biomimicry continues to shape the future of sustainable design.

Table 1- Biological Systems and Their Architectural Applications

Biological Model	Natural Strategy	Architectural/Urban Application	Challenge Addressed	Source
Termite mound	Passive airflow regulates internal temperature	Eastgate Centre (Zimbabwe)	Energy-efficient climate control	Turner & Soar, 2008
Lotus leaf	Micro/nano-texture causes water and dirt to roll off	Self-cleaning windows, façades, and solar panels	Maintenance reduction, water savings	Barthlott & Neinhuis, 1997; Koch et al., 2009
Cactus skin	Ribbed and waxy surface directs dew and limits evaporation	Water-collecting walls and desert architecture	Water harvesting and conservation	Ju et al., 2012
Namib Desert beetle	Hydrophilic and hydrophobic patterns capture moisture	Fog-harvesting surfaces and roofs	Access to atmospheric water	Nørgaard et al., 2012
Spider silk	High tensile strength and flexibility	Lightweight tension structures, composites	Material efficiency and resilience	Fratzl & Barth, 2009
Honeycomb structure	Geometric efficiency with minimal material	Lightweight panels, modular construction	Strength with less material	Vincent et al., 2006

To fully understand the potential of bio-inspiration in sustainable architecture, it is essential to move from theoretical principles to real-world applications. Biological organisms offer diverse strategies developed through millions of years of adaptation, methods that can directly inform how we design, build, and operate urban environments. In the context of biomimicry, success lies not in copying nature’s appearance but in translating its functions, behaviours, and systems into human design in meaningful and measurable ways.

The following sections highlight three well-researched biological models, termite mounds, lotus leaves, and tree/root branching systems, that have inspired innovative architectural and urban solutions. These examples illustrate how biological strategies have been adapted into building systems to solve challenges such as climate control, water conservation, self-maintenance, and resource distribution. Each case connects directly to a practical application and is supported by scientific research.

Together with the following table, these case studies provide a foundation for understanding the depth and versatility of bio-inspired design. They showcase how learning from nature’s “design textbook” can produce more innovative, resilient, and sustainable human environments.