Ichneumon Wasp, family Ichneumonidae (possibly Enicospilus purgatus), at my porch light (Iowa, USA).
A pair of odorous house ants, Tapinoma sessile, tends to a colony of green aphids on the underside of a leaf (host plant unknown). (Iowa, USA)
Thistle-feeding aphids, genus Aphis, being tended by Formica neogagates in Wisconsin, USA.
