| Drinking bird | |
|---|---|
 Drinking bird about to dip its beak in the water | |
| Classification | Heat engines |
| Application | Toy, scientific demonstration |
| Fuel source | Heat transfer |
| Components | Bulbs, tube, axle, support |
| Invented | 1945 / much earlier than 1920 |
Drinking birds, also known as dunking birds, drinky birds, water birds, or dipping birds[1][2][3] are toy heat engines that mimic the motions of a bird drinking from a water source. They are sometimes incorrectly considered examples of a perpetual motion device.[4]
- ^ Perelman, Yakov (1972) [1936]. Physics for Entertainment. Vol. 2. pp. 175–178. ISBN 978-1401309213.
- ^ American Physical Society (2012). "Insatiable Birdie". American Physical Society, with permission of the Hyperion(Reprint edition).
- ^ Exploratorium Teacher Institute (1993-07-27). "Exhibit-Based Energy Teaching at the Exploratorium" (PDF). US Department of Energy Office of Scientific and Technical Information: 3. doi:10.2172/6421909. Retrieved 2010-03-03.
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