How Birds See the World

By: Dr. Rob Fergus
Just how do fishes live? What is it about a fish that distinguishes it from other organisms. This article outlines these features of a fish and points out some of the most amazing characteristics a fish contains. Also find out just how much same a fish is to us humans.
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How Birds See the World
The human body contains over 215 pairs of skeletal muscles, making up approximately 40% of our total weight. Skeletal muscles get their name from the fact that they attach to and move our skeleton; they are what make our bodies move.
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how birds see, ornithologist, bird behaviour, understanding urban birds,cheap rayban sunglasses, bird control, humane bird control
Most birds have exceptional color vision.  Humans distinguish colors based on our color vision cells (cones) having three different color sensitivities.  Because the colors we see are based on these three different types of cells, we call that trichromatic vision.  Birds on the other hand usually have four different types of cones,Rayban Aviator Sunglasses, with one kind of cone allowing them to see ultraviolet light—making the world a very different place for birds!  It is important to remember that birds do not see colors like we do.  In fact, birds like crows that all look the same to us, actually look very different to each other—since they can see patches of ultraviolet coloring that allows crows to distinguish males from females and even individual birds from each other.  When we have trouble with birds, we need to take this into account.  That ######## owl that looks really good to us, who knows what it really looks like to a bird!  Maybe it doesn’t look so real or scary without whatever ultraviolet coloration normal owls have.
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When we watch movies, we know that we are really seeing a rapid series of 24 individual images a second that look like solid moving images to us.  If you blink a light faster than 60 times a second (60 Hz), it looks like a steady light to us.  Pigeons on the other hand have a “flicker fusion rate” of 100 Hz.  Birds of prey have an even higher rate.  This allows them to see and respond to things more quickly than we do—like approaching humans, or tree branches flashing past them in flight.  A movie of an owl diving on a pigeon would not appear to the bird as a single moving threat, but as a slide show of images.  Does that mean birds can distinguish shorter segments of time?  Does time itself move at a different speed for them?  Some of these differences seriously challenge our ability to even imagine!
 
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Ever wonder how starlings and other birds can fly in those huge twisting flocks without crashing into each other?  Without big blind spots like we have, it is much easier for birds to stay in formation with the other birds around them.  Next time you get a chance to watch a bird,Designer Discount Sunglasses -Costa del Mar, Oakle,Cheap Oakley Shield Sunglasses, notice how much it sees and how that impacts what it does.  You will see birds tilt their heads to look up at the sky, and birds pecking at the ground without having to turn their heads to look at the ground—all because their field of view makes this possible for them.
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Humans basically see most of the 180 degrees right in front of us, since our eyes are in the front of our heads.  Owls and hawks have similar forward facing eyes, but usually see a bit more of the world around them than we do—from 200-260 degrees.  That means they have a much smaller blind spot behind them.  Most birds have eyes on the sides of their heads, so they see even more of the world—pigeons see about 320 degrees around them, with only a tiny blind spot behind their head.  Ever wonder why it’s hard to sneak up on a pigeon?  Now you know!  They almost always see you coming.  It’s even worse with some ducks like Mallards.  Their eyes are so high on the sides of their heads that they actually see 360 degrees—the whole world–around them.
 
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Dr. Rob Fergus is an ornithologist who specializes in urban ecology and human/wildlife interactions. Fergus received his Ph.D. in urban bird conservation from the University of Texas at Austin. After founding the Hornsby Bend Bird Observatory in Austin,Cheap Rayban Retro Sunglasses, Texas he created additional bird conservation programs in Austin as the first executive director of the 2,500 member Travis Audubon Society. In 2004 he moved to suburban Philadelphia where he was the Senior Scientist for Urban Bird Conservation at the National Audubon Society until 2009. In addition to researching and consulting on human/bird interactions in cities across the United States, Latin America, and Europe, Dr. Fergus currently teaches at Rowan University in Glassboro, N.J. and Rosemont College in Philadelphia, Pa.
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Whether you have a problem with a bird, or just enjoy birds and want to know more about them, it can be useful and enlightening to explore the world form their point of view.  The way different birds actually see the world makes a big difference in how they interact with people and our world.  Knowing how birds see and interact with the world around them can help us avoid conflicts with birds and better direct our efforts to create a world that is acceptable and beneficial for both birds and people.
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Crows are among the most intelligent and adaptable birds in our yards and neighborhoods. So what do you do when one of these incredibly smart birds figures out that your house or yard provides something it wants and starts becoming a nuisance?
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So what do you do when a duck moves in uninvited? First realize that you actually did invite the duck—there is something about your yard that attracted the duck in the first place. Maybe it was the swimming pool, maybe it was a low bush for it to build a nest under, or just a place to climb out of the water and rest.
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First of all, when we’re talking about how birds see the world, we really are interested in how birds see.  Birds are very visual creatures.  What they see helps determine how they interact with the world around them—including us!  In some ways, birds see the world very differently than humans do.  It isn’t a stretch to say that they are living in a completely different world when it comes to how much of the world they see and how it looks to them.
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How Birds See the World
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Woodpeckers can cause several kinds of problems on buildings. In dealing with woodpeckers, a little bit of knowledge about them goes a long way. Most important is to realize that dead or hollow trees and tree limbs are central to their habitat needs. That is where they excavate holes for nests or to roost for the night,Oakley Sunglasses Sale, and where they spend a lot of time looking for insect grubs living under tree bark.
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So next time you are dealing with a problem bird,Oakleys Sale, or just watching a bird in your yard, watch how it sees and interacts with the world around it.  By knowing how much of the world it sees,Cheap Oakley Retro Sunglasses, and how it uses its eyes, you may be able to better understand what it is doing.  It may even help you figure out how to keep it from doing something that you is driving you crazy!
There are numerous qualities you’ll need to train as, and make, a good physiotherapist, a handful of these include: an interest in anatomy, physiology,Rayban Shield Sunglasses, health, fitness,Cheap Rayban Aviator Sunglasses, exercise, you’ll have to have a caring personality,Oakley Retro Sunglasses Sale, and interest in people, and a practical problem solving mind set. Once qualified you can diversify in many ways, you can work for yourself, work in the private sector, or for the NHS. Or perhaps you could specialise in sports injuries, neurology, elderly care or maternity care,
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Some birds can see polarized light and even magnetic fields.  Birds differ from humans in how close they can focus and how much of the world is in focus at any given time.  For pigeons, the ground they walk on is constantly in focus—leading them to bob their heads as they walk to freeze their view of the ground as their body moves instead of just having it go streaming by in a blur.
We see about 120 degrees of the world in front of us with both eyes—our binocular vision.  With eyes on the sides of their heads, most birds have a much narrower binocular view.  Pigeons, with their wide view of the horizon, have only about a 23 degree binocular field of view.   Owls may have a 50 degree binocular view—pretty wide for a bird.  We use our binocular vision to help us with depth perception (stereopsis). Birds don’t really do this, but just like us, when both eyes are able to look at something it helps them better see faint objects or keep moving objects—especially prey—in their field of view.  For Mallards, instead of having a narrow binocular view in front of them, they have a narrow binocular Mohawk strip over the top of their heads—presumably the better to see where they are going or predators that may be above them when they have their bills down in the water!
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Airport terminals, retail stores, warehouses, and other large buildings often attract birds—usually house sparrows,Ray Ban sunglasses, European starlings, and rock pigeons (the more formal name ornithologists call pigeons). Keeping them off the building is usually possible with a well designed system of physical deterrents like bird spikes. But what can you do when the birds get inside the building?
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Where we have just one set of cones to help us see greens, many songbirds have two—probably allowing them to make much more subtle differentiations between greens.  All the better to spot green caterpillars on green leaves.  Birds also have colored oil droplets on their cones, which serve as internal sunglasses to provide different filters for different parts of their world.  Pigeons have yellow filters to give them a better view of the sky,Rayban Retro Sunglasses, just like aviator sunglasses,Rayban Shield Sunglasses Sale, and red filters of the ground so they can better find seeds to eat on the ground.
 
 
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Science is commonly associated with logic and systematic methodology. However, there is much creativity and art in the very nature of science. This subject is one that has much to offer even in the realm of artistry.
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First the good news. In general, a hawk or even an eagle will not attack an animal as large as even a small dog unless there is nothing else for it to eat, and even then it would be very unusual.
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