Capybara
The capybara demonstrates remarkable plasticity within certain strict parameters. These semi-aquatic rodents require access to water for thermoregulation, mating, and escaping predators—their webbed feet rather give away their aquatic commitments. They have adapted splendidly to human-modified environments, appearing in Brazilian golf courses, Argentinian suburbs, and Japanese hot springs with equal aplomb. Their digestive system can process a wide variety of vegetation, including crops that farmers would rather they didn't. Yet they remain fundamentally tied to tropical and subtropical climates, unable to survive freezing temperatures. The capybara's adaptability, whilst impressive, operates within a thermal comfort zone that would make a Floridian seem adventurous.
Forest
Forests have conquered nearly every terrestrial environment on Earth, from the frozen taiga of Siberia to the steaming tropics of Borneo. They have survived ice ages, mass extinctions, and continental drift. Forests adapt not merely as individuals but as systems, with species composition shifting over centuries to match changing conditions. When one tree species falters, others expand to fill the gap. Boreal forests endure temperatures of minus 50 degrees Celsius; rainforests thrive in 35-degree heat with 90 percent humidity. Forests have existed for approximately 350 million years, adapting continuously whilst individual species come and go. This is adaptability measured not in lifetimes but in geological epochs.