A crow steals a ring from a windowsill. A magpie hoards tinfoil. A bowerbird decorates its nest with bottle caps and coins. The idea that certain birds are irresistibly drawn to shiny things is one of the oldest stories in birdwatching - and it turns out to be mostly wrong, but partly right, and far more interesting than the simple version suggests.
The 12 Species
| Bird | What they collect | Why |
|---|---|---|
| Magpie | Foil, glass, jewellery (sometimes) | Curiosity, not compulsion. Debunked as myth - see below |
| American Crow | Coins, buttons, keys, foil | Caching behaviour, novelty-seeking |
| Common Raven | Shiny stones, metal, glass | Play and exploration |
| Blue Jay | Foil, reflective objects | Curiosity and investigation |
| Jackdaw | Small metallic objects | One of the few species with genuine demonstrated attraction |
| Satin Bowerbird | Blue and shiny items (bottle caps, straws, feathers) | Sexual display - decorates bower to attract mates |
| Great Bowerbird | Glass, metal, white objects | Same as above - arranges objects by size for optical illusion |
| Burrowing Owl | Foil, shiny debris | Lines burrow entrance, possibly to attract dung beetles |
| Black Kite | White and shiny plastic | Nest decoration as a status signal to rivals |
| Scrub Jay | Coins, foil, small objects | Caching instinct - treats shiny items like food |
| Rook | Occasionally shiny items | Less common than crows, but documented |
| Clarkâs Nutcracker | Reflective objects | Caching behaviour similar to other corvids |
The Magpie Myth
The thieving magpie is one of the most persistent myths in ornithology. Rossini wrote an opera about it. It is embedded in folklore across Europe. And it is largely untrue.
A 2014 study at Exeter University tested magpies with shiny and non-shiny objects. The result: magpies were actually more cautious around unfamiliar shiny items than plain ones. They did not preferentially collect them. They were wary of them.
Magpies are not attracted to shiny things. They are highly curious, intelligent birds that investigate anything unusual in their environment - shiny or not. The myth persists because people remember the times a magpie picked up something glittering and forget the thousands of times it ignored shiny objects entirely.
What magpies are is bold, visible, and living close to humans. They investigate gardens, patios, and outdoor dining areas. When one happens to pick up a coin or a piece of jewellery, it is memorable. When it picks up a stick or a leaf, nobody notices. This is classic confirmation bias.
Why Corvids Investigate Objects
Crows, ravens, magpies, and jays are all corvids - the most intelligent bird family. Their interest in objects is not really about shininess. It is about:
- Novelty - Corvids are neophilic (attracted to new things). Any unusual object gets investigated, shiny or not.
- Caching instinct - Many corvids cache food for later. This behaviour sometimes extends to non-food items that look potentially useful or valuable.
- Play - Young corvids in particular manipulate objects purely for entertainment. Ravens have been filmed sliding down snowy roofs repeatedly for fun. Picking up a shiny object is the same impulse.
- Tool potential - New Caledonian crows make and use tools. Investigating objects is part of their problem-solving toolkit.
Bowerbirds: The Real Collectors
If you want birds that genuinely, purposefully collect decorative objects, bowerbirds are the answer. Male satin bowerbirds build elaborate structures (bowers) and decorate them with blue and shiny objects to attract females.
This is not idle curiosity. It is sexual selection at its most extreme:
- Colour preference - Satin bowerbirds strongly prefer blue items: blue bottle caps, blue straws, blue feathers, blue flowers. They will also use shiny objects regardless of colour.
- Arrangement matters - Great bowerbirds arrange objects by size, creating a forced-perspective optical illusion that makes the bower appear smaller (and the male larger) to the watching female.
- Theft is common - Males routinely steal decorations from rival bowers when the owner is away.
- Quality signals fitness - A well-decorated bower signals an experienced, resourceful male. Females choose mates based partly on bower quality.
Should You Worry About Your Jewellery?
Probably not. The odds of a bird stealing something valuable are extremely low. But if you are in an area with bold corvids:
- Do not leave small shiny items unattended outdoors
- Crows and jackdaws are the most likely culprits, not magpies
- Lost items usually end up in a cache or nest nearby, not far away
- If a crow brings you gifts in return for food (this happens), enjoy it - you have been chosen