Just more evidence that non-human animal species have deeper intelligence than we give them credit for, and communicate in ways to which we are oblivious. Wired Science discusses a secret form of bird-language, which we should probably learn if we hope to foil the coming avian takeover:
The discovery of messages in raptors’ nests has raised the possibility that many bird species encode signals into these structures, with seemingly decorative flourishes actually full of meaning.
Among black kites, scraps of white plastic are used to signal territorial dominance. To other kites, the scraps are a warning sign. To humans, they hint at an unappreciated world of animal communication.
“It’s probably very common that other bird species decorate their nests in ways compatible with what we found,” said Fabrizio Sergio, a biologist at the Doñana Biological Station in Spain. “And not only birds, but fish and mammals.”
A few species, such black wheateaters and bowerbirds, are already known to use nest design in courtship displays.