Much has been said already, and said well about the necessity to protect and rebuild birds habitat through our garden space. Including berrying shrubs and trees in the winter garden is one strategy to help birds survive the winter.
Another strategy is to cut herbacious plants with seed heads down in early spring: leave them standing through the winter. This gives the birds who winter over a nice buffet, and proliferates the plant species through the bird’s defecation patterns. Provided that existing garden plant choices are native species, this has a spiderweb effect of effortlessly extending habitat as the birds move the seeds and plant them elsewhere. An added bonus to building habitat and feeding birds is how spectacular and delightful birds in the winter garden are.