Burnham later worked in various public positions and also as a member of the Boone and Crockett Club of New York , and as a founding member of the American Committee for International Wildlife Protection ( now a committee of the World Conservation Union ) . In his later years , Burnham filled various public offices and also served as a member of the Boone and Crockett Club of New York , and as a founding member of the American Committee for International Wildlife Protection ( now a committee of the World Conservation Union ) .