The Bichos represent the last stage of Lygia Clarks's geometric research that, since the 1950s, had been involved with a systematic deconstruction of traditional painting into its key elements: line, plane, and surface. These components were crucial to the Neo-Concrete movement she developed with Hélio Oiticica, Willys de Castro, Hércules Barsotti, and others in Rio de Janeiro in the late 1950s and early 1960s. In Neo-Concretismo, the object itself is progressively negated, in favor of the the body and the community, by and large, as kernels of a happening, a rite, or an action. The artist named them Bichos because of their fundamentally organic character. In addition, the hinge that connects the planes reminded the artist of a spinal column. More important, the Bicho has no reverse, no other side. The layout of the metal planes determines the position of the "critter," which at first sight seems limitless. Here, 10 semicircles and 13 triangles connect by hinges in order for the object to take on various shapes.