Homing pigeons navigate like pilots

Homing pigeons navigate in the same classic way as human pilots, by spotting landmarks on the ground, research shows.





And like their human counterparts, they can be confused by landscape that all looks the same.

The birds are best able to memorise flight paths when the terrain below is neither too featureless nor too crowded.

"We discovered that pigeons' ability to memorise routes is highly influenced by the visual properties of the landscape in a 250 metre radius below them," said lead scientist Dr Richard Mann of Uppsala University, Sweden.

"Looking at how quickly they memorise different routes, we see that visual landmarks play a key role. Pigeons have a harder time remembering routes when the landscape is too bland like a field or too busy like a forest or dense urban area.

"The sweet spot is somewhere in between; relatively open areas with hedges, trees or buildings dotted about. Boundaries between rural and urban areas are also good."

Dr Mann and colleagues from Oxford University and the Zoological Society of London released 31 pigeons from four sites around Oxford for an average of 20 flights each.

Their findings, published in the Royal Society journal Biology Letters, showed the birds were better navigators over landscapes with a certain visual complexity, such as rural areas with hedges.

Pigeons navigate exceptionally well despite having small brains. Whatever method they use must make highly efficient use of their limited mental processing, scientists believe.

"There may be certain rules that free-flying birds use to structure information that enable them to map the environment using their limited brain power," said co-author Professor Tim Guilford, from Oxford University's Department of Zoology.

"Fundamentally understanding how they do this will tell us more about their abilities and limitations, and could reveal methods that robots with limited processing power might use to navigate."

Knowing the landscape features that pigeons use to navigate could also help researchers to predict the flight patterns of any birds that are active during the day, or diurnal.

Identifying the likely flight paths of birds could be of use to conservationists, birdwatchers and town planners.

"Homing pigeons provide a reliable model for studying navigation and there's no reason to believe that other diurnal birds won't use similar methods," said Prof Guilford.


Share

2 min read

Published

Updated

Source: AAP


Share this with family and friends


Get SBS News daily and direct to your Inbox

Sign up now for the latest news from Australia and around the world direct to your inbox.

By subscribing, you agree to SBS’s terms of service and privacy policy including receiving email updates from SBS.

Download our apps
SBS News
SBS Audio
SBS On Demand

Listen to our podcasts
An overview of the day's top stories from SBS News
Interviews and feature reports from SBS News
Your daily ten minute finance and business news wrap with SBS Finance Editor Ricardo Gonçalves.
A daily five minute news wrap for English learners and people with disability
Get the latest with our News podcasts on your favourite podcast apps.

Watch on SBS
SBS World News

SBS World News

Take a global view with Australia's most comprehensive world news service
Watch the latest news videos from Australia and across the world