Bill Williams River National Wildlife Refuge is restoring the health of this river ecosystem, which supports more than 350 species of birds and a wide range of other wildlife and plant species.
Check out a gallery of images of the wildlife that lives in, or travels through, the refuge throughout the year. It is host or home to many living things, from large mammals to small insects.
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Along Arizona's rivers is where 80% of the state's plant and wildlife species can be found. These riparian corridors support an incredible diversity of species.