A few years ago I found these colorful nymphs on a local cork oak tree.

oak-aphid-nymphs-psI figured they were aphids, but I wasn’t sure what kind.

oak-aphid-1-ps

Looking at BugGuide, I found out they are oak aphids in genus Myzocallis.

oak-aphids-3-psGiven their striking color patterns, I wish I got some better photographs.

Have you ever seen aphids on oak trees? What color were they?