Many birds and other animals such as foxes depend on berries as food sources, especially in the winter when other food options are limited. The valley has a wide variety of plants that produce berries, some of which are edible by people but many of which range from mildly to severely toxic if eaten. DO NOT consume any berries unless you are completely confident of whether or not they are safe for human consumption.
Here are a few images of berries from around the valley. (Photos by Skip Via.)