The "Fairy Bagging" Mystery: Why Do People Hang Dog Poo Bags on Trees?

Anyone who walks regularly in the UK has seen it: a small, neatly tied bag of dog poo, hanging from a tree branch or stuffed into a hedge. It has even picked up a nickname among rangers and conservation groups, "fairy bagging." It is baffling, and it is one of the most reported forms of dog fouling frustration in the country.

So why does it happen?

There is no single answer, but a few patterns come up again and again when councils, rangers and dog charities have asked owners about it.

"I'll grab it on the way back." This is the most common explanation. The owner bags the mess with every intention of collecting it on the return leg of the walk, then either forgets, takes a different route back, or simply loses track of exactly which tree it was on.

"There's nowhere to put it." In areas without a nearby bin, some owners feel bagging it and hanging it up is at least better than leaving it loose on the ground. It is an understandable instinct, but it is not actually a solution, more on that below.

"Someone else will deal with it." In some cases it reflects a genuine, if misguided, assumption that park staff or council workers routinely clear the trees and hedges, the same way they might empty a bin.

A small minority just do not care. As with all dog fouling, a portion of cases come down to simple carelessness or a belief that a bagged mess is "basically dealt with," even hanging in a tree.

Why it is actually worse than leaving it on the ground

This is the part that surprises most people. Unbagged dog mess breaks down naturally in around 9 weeks. Wrapped in plastic and hung in a tree, it does not break down at all in any meaningful timeframe, a standard plastic bag can take hundreds of years. Conservation groups, including the Woodland Trust, have specifically flagged this as harmful to wildlife: birds can become entangled in bag handles, and grazing animals can ingest fragments of degrading plastic.

So the well meaning "I'll deal with it later" instinct often creates a worse outcome than doing nothing at all.

What to do instead

• If there is no bin nearby, carry the bag with you until you find one, in a pocket or a small dispenser, rather than hanging it up
• Plan your route around known bin locations if you walk the same area regularly
• Report missing or overflowing bins to your council, this is a legitimate and common request, and often results in new provision
• If you genuinely cannot carry it for the rest of a long walk, take it home and bin it there

A better bag for a better habit

If you are going to carry a bagged mess home occasionally, a compostable bag at least means that if one is ever lost, blown away, or forgotten somewhere it should not be, it will not sit there for centuries the way plastic does.

Quick FAQ

Why is a bagged dog poo left in a tree worse than leaving it on the ground?

Unbagged mess breaks down naturally in around 9 weeks, but wrapped in plastic it can persist for hundreds of years and poses an entanglement and ingestion risk to wildlife.

What should I do if there's no bin nearby?

Carry the bagged waste with you until you reach a bin, or take it home, rather than leaving it hanging or tucked into a hedge.

Shop our compostable dog poo bags, small enough to carry all the way home