×îÐÂÂé¶¹ÊÓÆµ

Life

Why birds decorate their nests with weird and unnatural objects

Puzzlingly, many birds add human-made material to their nests with no obvious function – now there is evidence that these home improvements might ward off predators

By Sarah Philip

23 May 2025

Red kites sometimes put plastic objects in their nests

Mike Read / Alamy Stock Photo

Birds may decorate nests with artificial objects and feathers to deter magpies and ravens from taking their eggs.

Many birds have been observed placing human-made objects in their nests, such as plastic, wires or even anti-bird spikes from buildings. Often, these things seem to have no role as insulation or structural support, and may make nests more conspicuous to predators.

at Nord University and at the University of…

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox! We'll also keep you up to date with ×îÐÂÂé¶¹ÊÓÆµ events and special offers.

Sign up

To continue reading, today with our introductory offers

or

Existing subscribers

Sign in to your account
Piano Exit Overlay Banner Mobile Piano Exit Overlay Banner Desktop