How did Bird in Space express the idea of flight?

Constantin Brancusi’s Bird in Space expresses the idea of flight through the use of slender, elliptical lines that distill the concept of rapid movement into a concrete, abstract form.1

Rather than attempting to realistically depict a bird, Brancusi focused on capturing the "essence" of flight. By reducing the subject to its mystical inner core and utilizing polished-bronze surfaces, he created a work that emphasizes verticality and streamlined motion. This approach moved away from traditional anatomical representation, allowing the sculpture to embody the feeling of soaring rather than the literal appearance of a bird.123