Who was appointed as Chief of the National Biological Survey by President Theodore Roosevelt in 1934?

The appointment of Jay "Ding" Darling as Chief of the National Biological Survey by President Theodore Roosevelt in 1934 is notable because Darling was a prominent figure in the conservation movement and had a significant impact on wildlife management and policy during his career. He was an influential cartoonist and the first director of the U.S. Fish and Wildlife Service. His work focused on promoting the importance of wildlife conservation and the need for sustainable management of natural resources. This aligns with the broader conservation efforts initiated during Roosevelt's presidency, which emphasized the protection of public lands and the environment.

In contrast, other figures listed were impactful in their own rights but were not associated with the National Biological Survey at that time or did not serve in that specific leadership role. Rachel Carson is known for her groundbreaking work in ecology and environmental science, particularly through her book "Silent Spring," but she became prominent later, in the 1960s. John Muir is celebrated for his role in the establishment of national parks, particularly in California, but he had passed away before the National Biological Survey was established. William Hornaday was influential in conservation and played a role in animal protection, but he was not the Chief of the National Biological Survey. Darling's direct involvement in creating and