The American Robin lives throughout North America, and is seen as the harbinger of spring in cold northern states. The image above was captured in Summerhaven in March of 2016. During the fall and winter they will gather in flocks, as shown in the images below from Bend Oregon in December of 2016. In this case close to a hundred stayed together as a flock and feasted off of red berries of a local ornamental tree, sharing their table with a flock of Cedar Waxwings of similar size. Note that no living birds have teeth, so chewing a berry is not an option. Both the Cedar Waxwings and the Robins grab the berry and swallow it whole.
For more on the American Robin nesting and feeding fledglings, see the end of this blog post from Summer 2019