| Centers for Disease Control |
| Federal Aviation Agency - National Wildlife Strike Database |
| North American Breeding Bird Survey |
| US Code of Federal Regulations Search Engine |
| US Fish & Wildlife Service |
| US Fish & Wildlife Service Federal Migratory Bird Depredation Permit Application |
| US Geological Survey - Biological Resources |
| USDA Agricultural Statistics |
| USDA APHIS National Wildlife Research Center |
| USDA APHIS Wildlife Services |
| USDA Cooperative Extension |
| USDA Forest Service |
| USDA Wildlife Services State Reports |
| USGS National Wildlife Health Center |
| Western Integrated Pest Management Center |
