Where must one apply for a permit to control most migratory birds in the U.S.?

The U.S. Fish and Wildlife Service is the correct entity through which one must apply for a permit to control most migratory birds in the United States due to its responsibility for managing and protecting wildlife resources, specifically those birds that are covered under the Migratory Bird Treaty Act. This act provides federal protection for migratory birds and regulates the activities that can affect them, including hunting, trapping, and control measures.

The requirement for such permits arises because migratory birds are often protected under federal law, aiming to ensure their conservation and safeguard their populations. The U.S. Fish and Wildlife Service oversees the protocols to ensure that any control measures are carried out in a responsible manner that respects ecological balance and species viability.

In contrast, options like the Environmental Protection Agency and the National Parks Service do not focus specifically on the management of migratory bird populations, while the Wisconsin Department of Natural Resources primarily deals with state-level regulations and wildlife management, which would not encompass federal permit requirements for migratory birds. Hence, for actions concerning migratory birds, the appropriate course is to work through the U.S. Fish and Wildlife Service.