Mailing Standards of the United States Postal Service - International Mail Manual > 5 Nonpostal Export Regulations > 590 Exporting Wildlife and Protected Plants
Exports of wildlife items and products may be subject to declaration, license, marking, and permit requirements enforced by the U.S. Fish and Wildlife Service (USFWS). Similar requirements also apply to plants protected as endangered or threatened under U.S. law or international treaty. Live wildlife and dead animals, with only a few exceptions, may not be exported via the U.S. Postal Service (see 138.1).