how can birds fly with the help of alula ?!?
606849
The alula, or bastard wing, is a small, feathered projection on the anterior edge of the wing of modern birds. It is actually the thumb of the bird, and has been modified into an aerodynamical control device not too dissimilar from the forward slat on an airplane wing. Usually flush against the wing, the alula may be moved to modify the shape of the wing or provide a slat for direction of airflow, often to avoid stalling while landing. It has been found in all modern birds since Eoalulavis hoyasi, a primitive bird from the mid-Cretaceous, 115 million years ago.
1176488
Well, ounce for ounce, the bird's skeletal frame is extremely strong and light.  But what allows it to fly is a combination of things.  First of all the birds' muscles are totally different than that of a humans' which can be trained to do short sprints or long distance running or both. The birds' primary movement is flying and depending on the bird, they can fly long distance or fly quickly.  Most can not be a jack of all trades and fly long distance like a wild geese and be as quick as a sparrow.  \n\nSecondly what allows a bird to fly is a totally different internal organs compared to a bird.  Many birds have several pairs of lung like features that allows them to utilize oxygen extremely efficiently.  Also a birds digestive system is made so that it craps every 30 minutes or so after food intake.  This allows to minimize the body weight thereby allowing it to fly easier.\n\nThe feathers which are stream lined are what actually allows a bird to fly, but I would say that is just one aspect of WHY it can fly.    Take the ostrich.  It can not fly at all.  Take the Toucan.  It has streamlined feathers but it can not fly all too well either.\n\nHope that helps.
141770
To answer this question there are two principles of physics involved and to really understand it is a little difficult.\nThe shape of the wing determine the lift on the wing. The birds know it very well they know how to fly.\nBy making the top of the wing a curves and the bottom a straight line,we obtain two different traveling distances for the air fluid to flow.The angle which the fluid flows is called the angle of attack and in order to fly the airpla must have the proper andgle of attack least it stalls.\n\nBernoulli's principle says that if the velocity of the moving fluid is increased the pressure is decreased.\n\nThe velocity of air over the top of the wing is greater than the air flowing under the wing.Because the air travels a longer distance for the same time as the air floweing below the wing.Hence the pressure is less on top of the wing.\n\nBy Newton third law the bottom of the wing gets the greater lifting power.\nTherefore the statement in the first line of you question is correct.\nSo the plane mimics the flight of a bird.
998072
ok  this is  something the bird  learns  so its a  skill \nmotor  skills  are saved  evolved and  controled  by the assosiation of many parts of the barin but meaily it is  saved in the motor association area (is posterior to the post central gyri in the pareital lobe of the  brain under the postcentral sulcus) and controled by werniks area( in the superfitial pareital lobe anterior and inferior  to the triangular area of the transvers  sulcus)\nthese areas  are much more devaloped in the human beeing but they r  also present in the birds brain and  they controle  these muscle movements\nalso some corticospinal corticobulbar and  corticorubral tracts have some influence on that \nmaybe som other  areas  as the pyramidal area the substantia nigra the olive nucleus of medulla oblongata and the subcallousal area can have some  infuence as they are all  interconnected
934136
Technically they CAN fly, but only for a few seconds. They much prefer to run (..at speeds up to 17 mph). The roadrunner is also known as the Chaparral and is the state bird of New Mexico.
731
Not without human involvement.\n\nThere was the great auk, a species of flightless bird which occupies much the same ecological niche in northern Atlantic, which was the original bearer of the name "penguin". Its smaller cousins, the auks, retain the ability to fly.
1003410
Researchers have cracked the puzzle of how pigeons find their way home: they just follow the main roads.\n\nZoologists now believe the phrase "as the crow flies" no longer means the shortest most direct route between two points. They say it is likely that crows and other diurnal birds also choose AA-suggested routes, even though it makes their journeys longer.\n \nSome pigeons stick so rigidly to the roads that they even fly round roundabouts before choosing the exit to lead them back to their lofts.\n\nAnimal behaviouralists at Oxford University are stunned by their findings, which follow 10 years of research into homing pigeons. For the last 18 months they have used the latest global-positioning technology, allowing them to track the ground the birds covered to within one to four metres.\n\n"It really has knocked our research team sideways to find that after a decade-long international study, pigeons appear to ignore their inbuilt directional instincts and follow the road system," said Prof Tim Guilford, reader in animal behaviour at Oxford University's Department of Zoology.\n\n"For long-distance navigation and for birds doing a journey for the first time, they will use their inbuilt compasses and take sun and star bearings.\n\n"But once homing pigeons have flown a journey more than once, they home in on a habitual route home, much as we do when we are driving or walking home from work.\n\n"In short, it looks like it is mentally easier for a bird to fly down a road and then turn right. They are just making their journey as simple as possible".
47737
Not just storks ... but migrating birds in general  usually fly in the "V" formation.  This has been studied by a lot of very educated people in many colleges and universities.  Aerodynamics is the best guess answer. Each bird taking advantage of the wing tip vortices of the uplifting air of the bird in front of it.  This updraft actually lifts the bird making it's flight a little easier.
299785
Wild turkeys can fly.  Most Galliformes (the Order that chickens and turkeys belong to) are primarily ground birds, that can fly only short distances.  Their flight muscles are mostly glycogen rich fast-twitch muscle fibres that provide a lot of power for short periods of time.  We humans happen to find the white meat of these muscles tasty, so they have become popular domesticated animals.\n\nAs they were domesticated, selective breeding to increase the size of these muscles has resulted in huge domestic turkeys that are too heavy to lift themselves off the ground.\n\nSome breeds of domestic chicken can still fly because although they have also been bred for breast size, they are generally smaller animals and haven't yet reached the point at which they are too massive to lift.  \n\nBut, as Arthur Carlson discovered, domestic turkeys fly about as well as bags of wet cement.
111767
Um. . . .they both have wings and they can fly. :)
426165
Birds could fly with only 1 wing if if was "falling" in one direction, if not, then it can not fly. \nHuman Nature, people always want to be better than each other
273734
A chicken's wings has several functions.\n\nA chicken's wings are still useful for flying shord distances. The average length of time that a chicken can stay in the air for out 5-10 seconds. They do this to outmanuver predators, and to increase their jumping ability.\n\nChickens use their wings a great deal for balance, and to slow their fall.\n\nThey also use their wings for breeding.\n\nMale chickens, as part of a mating ritual, will drop one wing and circle the female. This either means "oh my God I love you" or "ha! I gotcha now!".\n\nIt usually seems to mean more of the second one, but occasionally I will see a male do it without trying to mate at all, and it seems more like a request for companionship type of thing. Its actually quite sweet.\n\nThe females use their wings when they are incubating eggs in order to help regulate their temperature, along with herding and protecting chicks. When caught in a fire, Hens have been known to huddle their chicks under their wings, and even though the she is killed, her chicks survive.
391527
They could. There were fish that evolved from swimming to walking. There is a fish called the flying fish that can jumpfrom the water and glide through the air for a ways to escape predators. Follow the link to see a picture, its fins look very similar to wings.\n\n\nhttp://oceanlink.island.net/oinfo/biodiversity/flyingfish/flyingfish.html
1005230
The flying that they do in those movies is an exaggeration of the truth.  There is a type of training that used to be done called "light-body" training, that starts when you're very young, like 3-4 years old.  There are many things they do, but one of the main things they focused on was keeping the spinal column soft.\n\nMost land mammals can't jump out of the water, like fish do, mostly because the spine has become hard/rigid.  At the same time some snakes can strike more than half they body length, because of their flexible body and a firm base.\n\nWhen people with this training would jump, they would "spring" with their legs and their spine giving them 2-3 times the height and 3-4 times the distance of the people without the training, that could only jump with their legs.\n\nEven doing this, couldn't make you "fly".  But, not unlike some monkeys and flying squirrels, if you simply bound, glide, and jump from point to point, through the woods/forest/jungle, going from object to object, it does give the appearance of "flying".  \n\nAnd YES, of course this could be done, very easily, through the city, running across roof tops, jumping an occasional alley way, and scaling larger buildings to "fly" from. \n\nBut, what goes up, most come down too.  Long story short, like Buzz Lightyear said "It's not flying, it's falling with style"
707767
Mathematically it is impossible for a honey bee's wings to support it in flight.\nThe praying mantis is the only insect that can turn it's head.\nScientists still do not know how a cat purrs or where in it's body the noise comes from.
6287
They will stay on the ground regardless of the speed. They are not aerodynamic, so they won't naturally rise in the air and fly because of speed unless they had wings added to them.
506259
white pelican flies\nacross the black moonlit sky\na beautiful bird