This is a direction-changing compliant mechanism obtained using topology optimization. When the triangle on the right side is pressed down, the extending beam on the other side moves downwards and to the right. When it is moving, this mechanism resembles a pecking bird.

Saxena, A. and Ananthasuresh, G.K., "On an Optimal Property of Compliant Topologies," Structural and Multidisciplinary Optimization, Vol. 19, No. 1, 2000, pp. 36-49.