Abstract art is a collective term for art movements of the 20th century that appeared after 1900.
It uses pictorial means partly abstracting from the object, partly completely detached from nature and real objects. Works of the former category show abstracted objects, figures, spaces. Works in the latter category make autonomous use of visual, artistic means without any mimetic reference to the object.
Birds of prey, also known as raptors, include species of bird that primarily hunt and feed on vertebrates that are large relative to the hunter.
Raylight, from the words ray and light, in ray optics uses the ray model of light and thus deals with the path of light on lines in a simple, purely geometric way.
Waldbühne: From the words forest and stage. Forest (Wald) in the everyday language sense and in the sense of most technical languages is a section of the earth’s surface that is covered with trees and exceeds a certain minimum coverage and minimum size, depending on the context of interpretation.