William Needham led a walk focused on fungi. He delivered our destination species, the diminutive fall-fruiting Red Chanterelle (Cantharellus cinnabarinus) in a corner of the park that most concertgoers never visit.
On the way back to the cars, another participant (whose name I have forgotten, alas) pointed out Variegated Fritillary (Euptoieta claudia) and its doughnut-hole field mark on the upper forewing.