Common redpolls (Acanthis flammea), named for their red cap, are small northern finches that breed from the southern edge of the Arctic tundra down into the Canadian coniferous forests. Their size, shape, actions and voice are similar to those of goldfinches and pine siskins. The bulk of the common redpoll’s diet consists of the seeds of several different trees, including birches, alders and willows, as well as grass and weed seeds. While their winter range extends southward as far as Massachusetts, in winters when the seed crop of these trees is exceptionally poor, large numbers of redpolls come even further south into the U.S. seeking food, and these visits are referred to as irruptions. The numbers of redpolls at feeders throughout northern New England, as well as their presence in states further south confirm that the winter of 2012-2013 is such a year. Look for large flocks moving about in undulating flight over fields, alighting on weeds, as well as at and under feeders, where millet and sunflower seeds attract them. Between the redpolls’ brilliant red crowns and their constant twitter, they are hard to miss!