People who like rocks see cool rocks everywhere.

People who like birds see interesting birds everywhere. The tree on your yard could be an exceptional specimen. The world around you could be amazing and magical, but you aren't enough of a nerd to see it.

The small subset of the world that an animal is able to detect is its umwelt. The bigger reality, whatever that might mean, is called the umgebung.The interesting part is that each organism presumably assumes its umwelt to be the entire objective reality “out there”.

Jakob von Uexküll (1864-1944) believed that every living creature inhabits a world of its own. The structure of this world is largely determined by the species to which a creature belongs, by its physiology, its behaviour, and its environment, but this world discloses itself only through individual subjective experience. As such, these worlds are