Jakob von Uexküll was a German biologist and philosopher known for his work in the field of biosemiotics. He introduced the concept of the "Umwelt," which refers to the unique perceptual world of an organism, shaped by its sensory experiences and interactions with the environment. This idea emphasizes that different species perceive the world in distinct ways. Uexküll's research highlighted the importance of understanding animal behavior through their own perspectives rather than solely from a human viewpoint. His ideas have influenced various fields, including ethology, ecology, and philosophy, contributing to a deeper understanding of the relationship between organisms and their environments.