Birds can see Earth`s magnetic field
London: Birds can see the Earth`s magnetic
fields through their right eye and use that information to
navigate effectively, German scientists have discovered.
Researchers at the Goethe-Universitat in Frankfurt
found that a bird cannot navigate properly if its right eye is
covered, but it won`t have any problem if the left eye was
Earlier studies had suggested that birds can sense
magnetic fields and use them to navigate, particularly when
migrating south for the winter.
But the latest research found the bird actually sees
the magnetic fields with their right eye giving information to
the left side of their brain.
The magnetic sensing overlaid over the normal vision
with the magnetic fields creating light or dark shadings over
what the bird usually sees.
"The shadings change as the bird turns its head,
giving it a visual compass from the patterns of shading," the
Daily Mail reported.
Scientists believe that the birds have molecules in
their retina which shift into an active state when struck by
blue light in which each molecule has an unpaired electron,
creating a "radical pair".
"The presence of magnetic fields affects the time it
takes for the radical pair molecules to revert to their
"Both the visual and magnetic images involve
variations in light and shade, but visual images tend to have
sharp lines and edges, while the magnetic images have more
gradual changes from light to dark," the report added.
Researchers led by Katrin Stapput discovered that when
this magnetic sense is distorted the patterns of light and
dark make little sense because the bird cannot separate the
information from the visual and magnetic images.
Stapput decided to test the theories by fitting robins
with goggles that were covered with clear foil on one side and
frosted foil on the other.
Both sides of the goggles were equally translucent,
allowing 70 per cent of the light to get through, but on the
frosted side the image was less clear. The birds were then
kept in cages until it was time for them to migrate.
The birds were released into a funnel-shaped cage with
its walls painted with fluid, which was scratched if the birds
The results were that birds with no eye coverings, and
birds with the left eye covered set off in a northerly
direction as expected, while those with the right eye covered
were disoriented and headed in random directions.
More from India
More from World
More from Sports
More from Entertaiment
- 'Maggi' under regulatory scanner for excess amount of lead, MSG
- When Subramanian Swamy shocked people at a wedding!
- Watch: Michelle Obama's 'Gimme Five' fitness video
- Mumbaikars join hands to save Pakistani teen with rare illness
- Mumbai: Diamond export company denies job to Muslim youth
- PM Modi speaks at Golden Jubilee celebrations of poet Dinkar’s works
- Aapke Sitare: Astro prediction for May 21, 2015
- Mirage 2000 fighter jet landing was part of capability demonstration: IAF
- Vadodara: Policemen seen dancing with bar girls
- Coal scam: Naveen Jindal, Madhu Koda and others get bail
- DNA: IAF Mirage 2000 fighter plane lands successfully on Yamuna expressway
- One year of Modi govt: Arun Jaitley addresses press conference
- DNA: Osama documents show 'Indian brother in Madinah' financed al Qaeda
- ISIS executes Syrian fighter using anti-tank rocket launcher
- Zee Media Exclusive: Kangana, Madhavan talk about their film 'Tanu Weds Manu Returns'
- CBSE Class 10 Results 2015 to be announced today?
- Check Jharkhand Board jac.nic.in: Class 12th Art Results 2015 declared
- Fawad Khan doesn’t want intimate scenes with Sonam Kapoor?
- Log on to apeamcet.org AP EAMCET Results 2015: Andhra Pradesh EAMCET Marks and AP EAMCET Ranks 2015 declared
- We hire only non-Muslim candidates, diamond export firm tells Muslim youth
- Is MSG in 'Maggi' noodles harmful for you?
- Mumbai firm booked for denying Muslim MBA graduate job on religious grounds, probe ordered
- Jayalalithaa makes public appearance, meets Governor: As it happened
- New IPL rules could see Chennai Super Kings lose MS Dhoni
- `Piku` hits jackpot, does Rs 100 crore business worldwide
- Anurag Kashyap to bid goodbye to India, settle in 'cinema-friendly' France!
- IPL 2015, Qualifier 2, Chennai Super Kings vs Royal Challengers Bangalore: Preview
- Geelani's passport application incomplete, cannot be processed: MEA
- CBSE Class X Results 2015 to be announced today?
- Kerala Plus Two Results 2015 on keralaresults.nic.in