This is scat (poop) from one of the local animals. The bluish grey things are Juniper berries, which is the clue I needed to identify the animal. What animal was it, and how do I know?
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This scat is from a gray fox (Urocyon cinereoargenteus). They are common mammals, but rarely seen. They are also the only American canine species that can climb trees as easily as a cat. This allows them easy access to the Juniper berries, which in winter are a source of nutrition. They also commonly eat rabbits, rodents, birds, fruit, and other plant material.