This is one effect of litter. Even if the wearer of the hair scrunchie did not notice right away when it fell off, how many passers-by thereafter passed it by instead of throwing it away before it got to where this bird found it?
I imagine it rolling like a tumbleweed in a stiff breeze, bouncing gently down a sidewalk or roadside, then one day lifting with the rising waters that meander and then rush toward the drains when it rains. Woosh, it swoops through a series of pipes and gushes out into a roadside canal. There it is, a bright trap waiting for a bird, or it could continue the journey it never should have started and float into Florida's wetlands, which is where I found this sorry sad Anhinga. He should have looked like this: