A red aphid (Uroleucon sp) checking out a colony of spittlebug (Cercopoidea sp.) nymphs in our yard, 10 August 2017.
The nymphs of the froghoppers, insects similar to leafhoppers, protect themselves by secreting a froth that looks a lot like spittle, thus earning the name “spittlebugs”. I don’t know what that red aphid was doing there. Maybe it was comparing sap-sucking techniques.