Pine Siskins, according to this article, are spreading deadly salmonella:
https://www.smithsonianmag.com/smart-news/songbirds-are-spreading-deadly-disease-birdfeeders-180977222/?utm_source=smithsoniandaily&utm_medium=email&utm_campaign=20210311-daily-responsive&spMailingID=44604529&spUserID=NzQwNDUzMTQ5NTcS1&spJobID=1960929045&spReportId=MTk2MDkyOTA0NQS2

Time to take the feeders down and empty the birdbath, I guess (3/11/21)

I'm taking my "Eliminator" squirrel proof feeders to Wild Birds Unlimited. They will disinfect them and clean them for a $5 donation. My seed feeders haven't been terribly busy lately, so I think the birds will be all right without them.