USGS scientist swabs fresh duck feces at Lincoln Memorial Reflecting Pool, Washington DC – USGS (.gov) by Marsha42 | May 14, 2026 | Lincoln Environment | 0 commentsUSGS scientist swabs fresh duck feces at Lincoln Memorial Reflecting Pool, Washington DC USGS (.gov)sourceSubmit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment *Name * Email * Website Save my name, email, and website in this browser for the next time I comment.
