How Do Birds Know Where To Go When They Migrate?
Вставка
- Опубліковано 12 січ 2015
- Birds can travels thousands of miles between their summer and winter homes. Why don’t they get lost? Their secret is a sixth sense: magnetoreception.
Learn more at HowStuffWorks.com:
animals.howstuffworks.com/bird...
Share on Facebook: goo.gl/dU1OtD
Share on Twitter: goo.gl/n7wDYj
Subscribe: goo.gl/ZYI7Gt
Visit our site: www.brainstuffshow.com
I’m Lauren, this is BrainStuff, and I have a topically relevant scenario for your consideration: Let’s say you want a change of scenery. So you set out with the clothes on your back, your innate knowledge of the world, and zip all else. No map. No smartphone. Nada. Would you be able to travel tens of thousands of miles, across oceans and continents? And then get back home a few months later?
Because lots of birds do this every year. It’s called migration. And often these birds go to the exact same summer and winter spots, using nearly the exact same routes, every time.
Ornithologists have speculated that birds might use a number of sights, sounds, smells, and learned social cues to get where they’re going. But young birds making their trip for the first time have been observed migrating successfully with no chaperones. What gives?
Research has revealed that migratory birds have vision-based magnetoreception: They can see magnetic fields. And Earth is lousy with magnetic fields.
Earth’s molten outer core is made up of iron alloys, which are swished around by heat coming up off of the solid inner core - and by the rotation of the Earth. That motion (plus the fact that iron is good at conducting electricity) creates a dynamo: A generator of electric and magnetic fields. Which basically? Makes Earth function like a giant magnet. North is positive, South is negative, and our planet is wrapped in slopes and curves of magnetic fields arcing between them.
And migratory birds can sense those fields! Experiments over the past couple decades have shown that birds prepared to migrate south will align themselves with magnetic south - even if you create an artificial “south” in a lab.
And furthermore: These birds see magnetic fields. Around 2010, researchers fit European robins with clear or frosted goggles, and found that the birds needed clear vision in their right eyes to navigate magnetically. Why not their left eye? No one knows.
Scientists are now studying what biological mechanism might be responsible for this. The popular theory goes that magnetic fields cause a chemical reaction in birds’ eyes that affect their sensitivity to light. So magnetic fields might show up as brighter or darker patterns spread out over everything the bird sees. Like a map on a heads-up display.
SOURCES:
www.nature.com/nature/journal/...
www.int-ornith-union.org/files...
www.ks.uiuc.edu/Research/magse...
www.ngdc.noaa.gov/geomag/faqge...
www.epa.gov/esd/cmb/Geophysics...
www.cell.com/current-biology/a...
www.cell.com/biophysj/abstract...
spie.org/x37204.xml?highlight=...
www.ks.uiuc.edu/Research/magse...
phys.org/news197872356.html - Наука та технологія
it's crazy how diffrent species view the same world. From bees to snakes to humans or dogs it's an entirely diffrent looking worid.
I love Lauren's presentations the best. She's a very fluid speaker.
Ok, but how do they know, how to get to the exact same spot, every time. You gave us a good explanation of how birds can navigate, but how do they know EXACTLY where to go, even younglings who have never made the trip before?
In White-Crowned Sparrows the juveniles use innate senses (or follow other birds). They travel south for x distance, hopefully that's the right place. Researchers loaded migrating birds onto an airplane and sent them cross-country. Juveniles just kept going south. Adults noticed something was wrong and flew back toward their original destination.
Great information, nicely presented.
I was just reading that many animals also have this magnetoreception. It's fascinating.
Our "vogel" on the birds ....(screaming big laff) really well written ..like "zip all else"
We would ABSOLUTELY get implants to see magnetic fields.
I love to see Lauren in brain stuff
Very informative. Thanks!
Thanks for the video. Very informative
There’s a phase shift, they see blue at the North and red at the south, with having eyes on the sides of their head (360 view) they can always see these fields so they know where they’re going. The things in their eyes are called cryptochromes which they have a lot of. Ken wheeler made this discovery
Thank you for the information. I captured an up close video on a migrating flock of seagulls, truly amazing. I would like to know if this migration in the country of Panama only happens once a year.
This helped a lot! Thank you.! :3
Simón Hernández
which seasons of year do the birds usually migrate?
Course 7
Thank You So Much! This Was Super Helpful!
^___^ Glad you dig it. Thank YOU for watching!
I can see magnetic fields.
So how does this work when they are not migrating? It would seem quite annoying to locate food if there is a constant smudge of magnetic fields in your eye (?)
This is a very good video .
Her last name means bird tree in German :)
Yes
That I know all too well. I myself am of German descent. (I'm German Australian)
Do need the birds of maps for to migrate?
Carolay Lora Seguro. Course 7.
(Academic Activity)
Curso 7 Colombo Americano
What is the main birds hability according to the video?
Hi, There're another animals that can use magnetoreception? I would like to know, it's a very interesting topic... Juliana Puerta♥ Course 7 - Colombo Americano (Bello)
"Earth is [Lousy] with magnetic fields"? Lol
There's a hearing aid that can hear wifi signals. seeing them could be useful, too
Your diagram of the earth as a bar magnet is kind of vague since you just said that the north is positive and south is negative with labels according to the geographic locations of the poles. However, the geographic north pole is in fact the magnetic south pole (which is - ) and the geographic south is the magnetic north (which is + ). The direction of magnetic field lines are correct however the labels or N and S may be taken out of context since it is used as a geographic marker.
Its ok because most people will be able to tell which one is which by finding where santa lives on the map.
How is the influence the magnetism in the birds? Liliana María Seguro Gaviria Course 7
The birds use the magnetic influence for the travel.
Heidi Gutiérrez Colombo sede Bello Cuso 7
How do migratory birds find their way?
In many ways birds are smarter and more capable than humans naturally.
First, thanks for the video.
BUT: I think the whole notion of "seeing magnetic fields" is a little bit misleading. Especially around the 2:18 minute mark. You say: "So magnetic fields might show up as brighter or darker patterns spread out over everything the bird sees. Like a map on a heads-up display."
This is very untrue and does not make any sense. The bird will only be able to see one magnetic value spread out over it's whole field of vision not a pattern. If it turns it's head, then the 'magnetic value' would change, but only then. The image you provide in the video would mean, that the magnetic fields (over the field of view of the bird) somehow interacts with the light or emits light so that the vision part of the bird's eye would detect a different light coming in. This is not the case and such interaction between a magnetic field and visible light isn't known. Rather - as can be read in the cited link from phys.org - the (proposed) magnetic sensor in the bird's eye is activated by (blue) light, which means, that it would be deactivated with the frosted goggles. Light in this case is only an enabler for the sensor and does not transmit any further information!
All in all, the bird cannot see a map of magnetic fields, but rather it would be able to sense a local value of the magnetic field. I think this distinction is very important to a possible understanding of the navigation that a bird has to do.
Oan Nam are you a scientist?
I trained my birds to come home from 380 miles 😊
How does glue work?
i need more of you lauren!!!!
I wanna the react of the birds when put whith that guy hwo had avery strong megnatic feiuld that can place an iron on hes chist and it will stick on ...
thank his one may task on the poject
nice
If you were going to get an implant to let you see things beyond human vision, it would be better if you could swap out different eyes for different purposes. Sure magneto-vision would be cool for a while, but before long you'd want infrared, ultra-violet, telescopic, microscopic, different spectal bands, the ability to see body changes that could cue you in if someone is lying to you, and so on and so on. I picture a sci-fi character with a satchel full of eyes for every occasion.
Or maybe: "Stanley, this is my *serious* eye. I look at people with this eye when I'm want to be serious. I don't know how many eyes I went through trying to find this eye, but this is the most serious eye I could find..."
But this still doesn't explain how do they know which way is hot or cold for them to survive, north isn't always cold south isn't always hot, nor is the inverse right.. So how do they know that? How do they even know they have to migrate
Okay. So, Wouldn't they be confused if the pole flipping happens?
Juan felipe vargas gonzalez Curso 7 Colombo americano sede bello
how the birds travel and don´t lost ?
the birds travel helped with the magnetism
wow
I wouldn't get such implant. What benefit could it offer me in the world today? Genuinely interested if anyone could give any advantages.
Why the birds search sunny weather? Santiago Bedoya Betancur
Why do birds migrate back to colder climates in the spring? Why not just stay in warmer climates all year round?
Not an implant but some kind of a device like some special goggles to see the magnetic fields , would be a good idea, will opt for that B-)
Ummm...your graphic of the bird flying has the magnetic field on the left side, but you say birds see the magnetic fields with their right eye. Still very interesting information and a nice explanation of the latest theory.
Dyslexics untie. :)
I'm dislexic and left and right confuse the fuck out of me... I think you mean ocd
Tell us stuff that we _don't_ already know. Watching these Brain Stuff videos, lately, is like rereading a set of World Book Encyclopedias from 1976.
you must be young and impatient with "repetition" ...it's a fact of life ... like getting married to a woman for 30 years .. it gives real meaning to JUST THE SAME OLD THING
Thanks Marv! You must be really well read.
Marv, where are your brainstuff videos?
Ssssshhh some people don't know that the birds can "see" the magnetic fields.
Whats the "Methane Time Bomb"???
those bangs
i'll get one if I am migrating south
The reason that the magneto sensors only exist in the right eye is because for birds living in northern hemisphere the sun rises from the east.
Yes i want it....
I'm reading a book now an immense world it is just amazing what God can do perfect creatures
All I could think of is kissing that neck and hugging that torso.
Which is the tool that the birds use to guide?
The birds using the magnetoreception.
Could only seeing it in the right eye mean that processing magnetic fields only happens in the left part of the brain? Idk if that makes sense or not.
It does! And I wouldn't ask those sort of questions if I were you, because you could go into the field of ornithology and make a tremendous discovery!
Asking questions is the best way to make discoveries.
I have a GPS. I don't need to see magnetic fields. ;)
i followed coast maby
Why the birds need to have a clear vision?
Carolina Tamayo- level 7
5D says to write a comment.
Last
Who discovered Magnetoreception
Karen Piedrahíta Cortés
How the birds can migrate without getting lost ?
Course 7
The birds can migrate because they have a vision with magneroreception
That purple background brings out yor beauty. Word!
Love the idea of gaining a sense of direction but I think seeing magnetic fields would be a little too much for the likes of this easily-distracted lady!
Can birds see the magnetic fields of the earth? Course 7.
BIGBRAIN
i need a new brain my one is damaged from a tbi
How do birds know they don't know it's all enxtinxt like how does your heart know to keep beating blood it's been beating ever since you were a fetus it's enxtinxt how can evolution give life this ability or was it designed
i would be a cyborg if i could!
Okay, great video, but her arm veins are kinda freaking me out. Seriously, they're like insane.
allah is creations its amazing
It be nice if allah didn’t create cancer too
First
Why birds migrate ?
Here is a little more information on the topic that you guys might find useful:
storm-news.tk/why-do-animals-migrate/
This girl is soo gorgeous! I think I'm in love.
NO ONE KNOWS!
ha ha this is a funny video... molten iron is not magnetic nor does it conduct electricity in any experiment ever been done. and what about migrating fish?........the earth is flat and the globe earth model is a giant lie to humanity
you need a sandwich ma'am ..