Velvet ant, on recently-removed bark from a chunk of wood. It might be the same individual from this observation: https://www.inaturalist.org/observations/4186681
(which would be interesting, since the wasp would have walked back to the same spot where I first saw it, which was maybe ~20 meters away from where I dropped it, in under 40 minutes).
Red body, black legs, Black head with orange dot
1 cm long
Sandy trail in sand hill mixed grass prairie and spruce.
The genus Dasymutilla belongs to the Mutillidae family. The females of the genus are well known for their painful sting, which is where many gain their common name, Cow Killer. The female is wingless and often resemble large ants while the males still retain their wings. The larva of the Dasymutilla are external parasites to various types of hymenoptera. When disturbed the Dasymutilla makes a high-pitched squeaking sound identical to the Pogonomyrmex (Harvester ant).