Home Range. There are a few studies of home territories for western tanagers. A conifer forest in Idaho averaged a home range size of 39,100 square meters, while in Montana; they have an average home range of 28,300 square meters.(Davis, 2001; Samuel, et al., 1985).here are a few studies of home territories for western tanagers. A conifer forest in Idaho averaged a home range size of 39,100 square meters, while in Montana; they have an average home range of 28,300 square meters. (Davis, 2001; Samuel, et al., 1985).