You’ve heard the phrase “the crotch of a tree.” Some people want to cover it up.

This post on Quiddity provides a couple of links to other sites about clothing for trees, including the Knit-Knot Tree project to create knitted items for trees, to cover them up completely.

I once had a desire to create cloth birds to hang in trees, just to see if anyone would notice. I think the desire passed, but it could come back. I still like the idea of fake birds in trees.