I am very grateful to you for all the useful information you posted.
I was so thrilled to see the little visitors yesterday -- and was
hoping they would return today but if they did -- it happened while I
had my back turned :-)!
So the majority ruled in favor of the lovely American goldfinch (in
its winter plumage) and I shall note going forward that vireos are
insectivores so, unless I start packing my feeders with bugs
(yeeeech!!!), they are unlikely to visit!
Thanks again and Happy Holidays to all,