The march was endorsed by the Audubon Society of Portland,[REF] Oregon Health & Science University,[REF] The Nature Conservancy,[REF] and Xerces Society,[REF][REF] and promoted by the Democratic Party of Washington County,[REF] Oregon Environmental Council,[REF] Portland State University's biology department,[REF][REF] and Rose City Astronomers [REF].
The Audubon Society of Portland organized a sign making party on April 20 [REF].