ORPI Ecological Monitoring Report
The Organ Pipe Cactus National Monument Ecological Monitoring Report (1997-2005) is the most comprehensive report available on the natural resources of Organ Pipe Cactus National Monument. Below you will find links to the entire document by chapters. Enjoy!!!
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Did You Know?
Gila Monsters are one of only two species of venomous lizards found in North America. You can find them in the late spring through early autumn at ORPI. They move really slow, and you have to try pretty hard to get bit. We don't recomend it. It hurts, and they don't let go.