Some of these moving, biomechanical bird sculptures look like they're about to take flight, while others resemble bizarre Muppets made over in metal. But one thing that they all have in common is that they are deeply satisfying to watch, with possibilities for special effects and industrial design alike.

Birds, by Bob Potts, 1996-2012

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(via YouTube)

Suspended Wings, by Dukno Yoon, a Kansas-based metalsmith and jewelry maker, 2002-2004

(via Dukno Yoon)

Creation Cinema, created by a Melbourne-based studio named ENESS in 2013, symbolizes Bunjil

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(via The Creators Project)

A duck wing by Bliss Kolb

Fortune Telling Bird, by Bliss Kolb

Chester, by Chris Cole

(via Chris Cole)

Little Bird, by Chris Cole

(via Chris Cole)

Condor, by Chris Cole

(via Chris Cole)

Study in bird motion, a sculpture made of popsicle sticks and mylar, by a design student named Joyce Lin, 2014

(via Behance)