English: A wildlife "guzzler" installed in 2008 at the Pryor Mountains Wild Horse Range in Montana in the United States. The "guzzler" is a precipitation (usually rainwater) collection device which traps water in a storage tank (ranging in size from a few to several thousand gallons/liters). The storage tank can be above-ground, partially buried, or below-ground. A mechanical valve senses when there is not enough water in the trough, and releases more water into the drinking trough from the storage tanks. Guzzlers are usually used to provide wildlife (and sometimes domestic animals) with temporary water sources during dry seasons.

Note the screen which prevents rodents from climbing into the storage tank and polluting it. The wooden fence prevents animals from trampling on and damaging the storage tanks.