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Birds see colour in a similar way to humans, study suggests
Zebra finches separate red and orange shades into two separate categories, much like humans do.
Researchers test zebra finches’ ability to distinguish between colours

A study by US researchers has revealed that birds may see colour in a similar way to humans.

Researchers from Duke University devised an experiment in which they tested the ability of zebra finches to distinguish between different colours.

The study, published in Nature, found that zebra finches separate red and orange shades into two separate categories, much like humans do.

Previous research found that zebra finch females prefer red-beaked males to orange ones. The reason being that redness is associated with good health.

Although this study did not test if birds preferred some shades over others, it is hoped the findings may reveal information about what might happen when a female gazes at a potential mate.

In the study, researchers used combinations of eight shades representing the colour of male zebra finch beaks. They showed 26 female zebra finches a set of paper discs, some two-toned and others solid coloured.

The birds learned that by turning over a two-toned disc, they would be rewarded with a treat. If they turned over a solid disc, they wouldn’t receive anything. If a bird picked a particular disc first, it was a sign that it recognised it as having two colours instead of one.

The experiment involved lots of different colour pairs, but researchers found that females had no trouble identifying colour pairs that were far apart on the colour spectrum (E.g. very red or very orange). When the birds had to choose between various shades in between, however, their reaction was not so clear.

Researchers note the ability to lump all shades on one side of a certain redness threshold may indicate that, when it comes to beak colour, females may not be picky about whether a potential mate is perfect.

“What we’re showing is: he’s either red enough or not,” said senior author and Duke biology professor Stephen Nowicki.

It is not yet understood if the threshold between what humans perceive as “orange” versus “red” is the same for birds. However, researchers say the finding lends support to the idea that colour labels are rooted in biology, and are not shaped by human culture or language.

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Nominations for 2019 RSPCA Honours Awards now open

News Story 1
 People across the UK are being urged to nominate a standout animal champion for the 2019 RSPCA Honours Awards.

The awards recognise those who have worked tirelessly to improve animal welfare, campaigned on behalf of animals, or shown true bravery. Previous winners include comedian John Bishop, who was awarded Celebrity Animal Champion of the Year, and 11-year-old Lobby Cantwell, who raised more than £1,000 for the charity through mountain climbs and bike rides.

To submit a nomination or find out more about the awards visit the RSPCA website. Nominations will remain open until 4 pm on Friday, March 15.  

Click here for more...
News Shorts
New £1m project to investigate dairy cow lameness

Scotland’s Rural College (SRUC) is leading a new £1 million research project to investigate the causes of lameness in dairy cows.

One in three dairy cows are affected by lameness every day in the UK, costing the industry an estimated £250 milion annually.

The project will take three years to complete and is due to finish by November 2021.

Professor Georgios Banos of SRUC commented: “In addition to pain and discomfort to the animal, lameness is associated with decreased milk production and inflated farm costs.

“Among cows raised in the same environment, some become lame while others do not. Understanding the reasons behind this will help us develop targeted preventive practices contributing to enhanced animal welfare and farm profitability.”