The tiny insect seen on this frog's head is a fairyfly. It was less than 1 mm long! This family includes the world's smallest known insects. They are insect egg parasitoids. I'm not sure why it was on the frog, but it didn't stay long.
Habitat: Resting(?) on Gray/Cope's Gray Tree Frog - Hyla sp. in a rural backyard.
*The genus ID is pretty definite; but, while the species ID is likely, it is tentative.