Monarch Nectaring

The two or three monarchs that have taken over my front yard are interested in a variety of plants. They nectar persistently on Liatris ligulistylus out front and also on a Spicebush (lindera benzoin) which is not blooming so I guess it exudes a sap that they like. Out back they are going back to the grapevines of my neighbor De, The vines are heavy with big grapes and the monarchs seem to sit on the uppermost leaves and sip on whatever liquid the leaves give off. I am pretty sure I saw a monarch on my veronicastrum which is reflowering since I cut it back. Usually only the earlier butterflies go for it, like painted ladies and red admirals. I had a hummingbird on some sedum that I potted up in the back yard. Tons of hummingbird activity this year. And they all like the butterfly bushes, especially the Tiger Swallowtails.