I have a challenge for myself that I have not yet built up the courage to try. I want to one day go into a wooded lot and only feed on insects or other invertebrates I find in the trees, shrubs and forest floor. Have you ever watched an insect-eating song bird closely as the scavenge about for bugs? It is truly amazing how often they are able to find and capture prey items. Often they seem to pick them out nowhere, gulp them down and continue on the hunt. The photo below pictures a southern-bound, female Scarlet Tanager as it eats a larvae of some kind that it just pulled from inside a small branch.
“Autumn Scarlet Tanager”
A Thousand Acres of Silphiums 
I have watched and marveled over the same thing, but have never considered joining them 😉 Think I’ll stick with my pistachios.
Hi Bill, saw more than the usual number of Scarlet tanagers this year; seemed almost common in the Boston Mountain high country in Arkansas; but fewer Summer Tanagers than usual.