Itasca Biological Station Bear Paw Point Breeding Bird Census, MN (1979-2025)

This dataset is part of an ongoing effort that began in 1979 at the University of Minnesota Itasca Biological Station to conduct an annual census of breeding bird territories on Bear Paw Point every spring. Students enrolled in Field Ornithology used an established 50x50 meter grid (11.5 hectares total plot size) and walked gridlines, identifying bird songs and estimating the number of singing males heard to determine the number of breeding territories for different species present on Bear Paw Point.本数据集为一项长期持续研究工作的组成部分，该工作始于1979年，由明尼苏达大学伊塔斯卡生物站（University of Minnesota Itasca Biological Station）发起，旨在每年春季对熊爪点（Bear Paw Point）的繁殖鸟类领地开展年度普查。修读《野外鸟类学》（Field Ornithology）课程的学生依托预先布设的50米×50米网格（样地总面积达11.5公顷），沿网格线行进，通过辨识鸟类鸣唱声并估算现场听到的鸣唱雄性个体数量，以此确定熊爪点上各栖息鸟类物种的繁殖领地数量。