Birds that like shiny things (and the magpie myth that won't die)

A researcher at Exeter University set out small piles of objects near wild Eurasian magpies. Some were shiny: foil squares, a ring, a screw. Some were plain: pebbles, wooden pegs. The magpies approached the plain items first. When they encountered the shiny ones, many retreated.

That study - Shephard, Lea, and Hempel de Ibarra, published in Animal Cognition in 2014 - did not kill the ‘thieving magpie’ story. It is too old and too good. Rossini wrote an opera around it in 1817. It runs through every European folk tradition that bothered to have magpies in it. But the experiment shifts the question. The interesting story is not which birds steal your rings. It is which birds actually collect objects, and why, and what that behaviour costs them.

What the magpie myth gets wrong

Pica pica, the Eurasian magpie, is a corvid - highly intelligent, bold, and comfortable in human-modified landscapes. Those three facts are the whole explanation for the myth.

Magpies investigate anything unusual in a garden, shiny or otherwise. When one picks up a coin beside an outdoor table, the person watching remembers. When the same bird picks up a dried leaf twenty times a day, nobody records it. The myth is a product of selective memory. Bold, visible birds produce memorable incidents.

What magpies are drawn to is novelty. Like all corvids, they are neophilic - attracted to new objects in a familiar environment. That attraction is not specific to shine. A bright-orange peel dropped in a known garden draws the same careful approach as a foil wrapper. Novelty is the signal, not glitter.

The corvids that do investigate objects

Blue jays, American crows, common ravens, and jackdaws all turn up in the literature on object-handling. The most commonly cited case for shine-specific interest is the jackdaw (Corvus monedula), which has a reputation in the literature for picking up bright and metallic objects - though whether that reflects a true preference for shine or simply a response to novelty and contrast has not been cleanly resolved. The jackdaw case is real but narrower than the folklore suggests.

Crows and ravens are more accurately described as curious than acquisitive. A crow that carries off a coin is running the same caching instinct that stores acorns. Shiny objects get treated as potentially valuable - not because the bird understands value, but because novelty-seeking and caching are the same behavioural impulse in parallel. Birds that look like crows - including the common raven - share this object-curious character. If you have watched a crow work methodically through debris on a beach, you have seen what the myth simplified into ‘attracted to shiny things’.

Magpies are not attracted to shiny objects. They are intelligent birds that investigate anything unusual. The myth survives because people remember the memorable case and forget the hundreds of plain-object encounters they never noticed.

Bowerbirds: genuine collectors

If you want a bird that purposefully selects and arranges objects for display, the bowerbirds of Australia and New Guinea are the correct answer. The behaviour is not idle curiosity. It is sexual selection.

Male satin bowerbirds (Ptilonorhynchus violaceus) build stick structures on the forest floor and spend months decorating them. Satin bowerbirds have a pronounced colour preference: blue. Blue bottle caps, blue straws, blue snail shells, blue feathers stripped from other birds. Objects that happen also to be shiny qualify if they are blue. Shine is incidental.

The great bowerbird (Chlamydera nuchalis) takes this further. It arranges objects by size in a gradient leading to the bower entrance, creating a forced-perspective illusion that makes the male appear larger to the female watching from the corridor. Endler, Endler, and Doerr, writing in Current Biology in 2010, documented the arrangement and confirmed it is not random - males whose size gradient was experimentally reversed rebuilt it within three days.

This is not a bird distracted by glitter. It is a construction project maintained over months, tuned to a female audience, and subject to constant theft by rival males. The satin bowerbird and the thieving magpie are, in this sense, the opposite of each other. One is a myth built on anecdote. The other is documented sexual selection operating through interior decoration.

What this means for your garden

Your jewellery is almost certainly safe. Jackdaws near a busy patio are the highest real risk. A magpie on your lawn is investigating, not hunting.

The Northern Cardinal at your feeder collects nothing. His moulting cycle in August is a more dramatic biological investment than anything a corvid does with a bottlecap - carotenoids routed into new feathers over six weeks, the whole process visible from a kitchen window. Both the cardinal and the bowerbird are doing something purposeful. The cardinal does it chemically. The bowerbird does it architecturally, with blue plastic.

The myth persists because it flatters us. We like to think birds want what we value. The crow carrying off a ring is a better story than a crow turning over a mussel shell on a beach. The actual story - that the most sophisticated collectors in the bird world are building optical illusions in Queensland rainforest to impress a single watching female - is better than any of it.