In 1886, he became the first chief of the Division of Economic Ornithology and Mammalogy of the United States Department of Agriculture, predecessor to the National Wildlife Research Center and the United States Fish and Wildlife Service.
1886年，他成为美国农业部经济鸟类与哺乳动物处(the Division of Economic Ornithology and Mammalogy)的首任长官，该部门是国家野生动物研究中心和美国鱼类及野生動物管理局的前身。