does a bird still have to keep flying if he enters a moving bus?
817165
Very simply:\n\nIf he keeps flying at the same speed, he will be moving at his flight speed plus the speed of the bus.\n\nIf he stops flying, he will fall to the floor (or perhaps land a bit more gracefully than that), and be moving only at the speed of the bus (his flight speed has gone to zero).\n\nIf you jump in a bus, you continue to move forward at the same rate as when you were standing, so you land in the same spot on the floor.  Of course, if the bus changes velocity while you are in midair, your motion will be different from its and you will not be in the same spot when you land.\n\nThe same goes for the rotation of the earth... the circumference of the earth is about 24,000 miles at the equator.  Hence, at the equator, it is moving at about 1467 ft/sec.  If you jumped and stayed in midair for 1 second, the earth would travel 1467', but you are travelling at the same rate and you would land in the same spot you jumped from.
964669
If it has wings it's a "fly"\nIf it doesn't it's  "grounded"!!! \nThat was a cute question. I'd never thought of that....LOL ;o)
461940
Yes. They could fly inside a space shuttle. Birds would have a hard time adjusting to the lack of gravity though, and would look funny trying to fly. Assuming there would be the normal amount of air inside the shuttle, the wings would be effective as they would push some air around.
746359
Why does a bird fly?  A fish swim?
1042915
It depends on the species of bird. Some it may take months, some weeks, some a week, and others just a few days. It also depends on the health of the parents and baby. If the parents are healthier they can take better care of the baby so it will be healthier and can fly sooner. Also a healthier parent will teach the baby sooner and quicker. But some bird such as the ostrich, emu, and South American rhea do not fly. Sorry I was unable to be more specfic as it would have been impossible to give you an exact time period. After originally answering this question you e-mailed me saying that the birds were sparrows. Sparrows are small birds and as such, will learn to fly quickly. It may be anywhere around 6-14 days.
700029
Ideally for the bird it must contain enough energy to justify the energy consumed in gathering it.  If not then the bird was better off staying put.
18602
No. The speed at which the air is forced out is quite higher than a speeding vehicle. The eye shuts involuntarily in response that.
1025041
It will continue to hover because the air that it's wings are beating against is moving at the same speed as the train. This of course is assuming that the premise requires that all windows are shut and the air is still.
884352
Interesting question. See, in order to achieve lift, an airfoil (or bird's wing in this case) must deflect air down in order to achieve an upwards lift. This is a consequence of Newton's 3rd Law ("For every action, there is an equal and opposite reaction").\n\nNote that this DOES NOT imply that the downwardly-deflected air reacts against the truck bed. This is a common misconception; note that rockets have no trouble zipping around space, even though their exhaust has nothing to react against. \n\nOne caveat though: naturally, if the airfoil or wing passes close enough to the truck bed, the deflected air will push against it, causing a small force, like when you feel the breeze coming off of a ceiling fan. However this is simply a consequence of the proximity of the objects rather than a physical interaction between them.\n\nSo in answer to your question, yes. If every canary were to take flight at the exact same instant, and the truck is tall enough that the air deflected from their wings does not reach the floor, then the truck will measure its "canary-free" weight on the scale:\n\nW = (M - m)*g\n\nW = 19,900 lbs\n\n-----\nBONUS POINT\n-----\n\nFish are different from birds in that, for a bird to move in 3-dimensions, it has to deflect air (as discussed above). A fish, however, does not. The fish maintains its position using Archimedes Principal; that is, by absorbing and expelling water or expanding and contracting its rib cage, it can alter its "altitude" in the water, just like a submarine.\n\nThe bird remains in the air by constantly deflecting it down; a fish remains above the bottom of the tank by actually resting on the water. In this sense, the weight of the fish is transferred through te fluid as though the fish were part of the tank itself (regardless of the fish's position therein).\n\nThus: canaries flying inside the truck - the truck measures it's empty weight; fish swimming inside the truck, the truck will measure its loaded weight.\n\n\nHope that helps! :)
213139
Although the "balance" hypothesis sounds logical, experiments have determined that the head-bob of pigeons is rather related to vision.\n\nI'll quote myself (from the answer at the bottom link):\nHead bobbing has been hypothesized to be related to vision.\nWhen a bird's head is still, the images can form on the retina without the blur of motion. \nNow you're thinking: but the head is not still, it's bobbing! \nHowever, this is a visual effect, and in reality the head is keeping immobile, while the body moves. Head bobbing increases the stillness of the head during walking, running and landing. \nHead bobbing is not caused by an anatomical link of feet to neck or something like that; instead, it's synchronized with the movements of the feet, and although this could and has suggested a biomechanical function (balance, like our arm-swinging movements during walking), experiments have proven that head motions are determined by visual stimuli rather than biomechanical or inner-ear stimulation. \n\nThis is from a research paper:\nhttp://www.biomotionlab.ca/Text/TrojeFrost00.pdf
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.
612806
I'm not going to give you some useless chickadee facts.  If you are asking about the flight pattern, I assume you already know what one looks like and where it lives.  So I'll cut to the chase.  Regarding how the chickadee flies, it "rolls."  It flaps a few wingbeats and then brings its wings close to its body and allows itself to fall through the air like a torpedo, riding the momentum.  It then starts flapping its wings again.  Then falling, then flapping, then falling, then flapping.   This kind of flight acts to greatly conserve energy.  As far as migration patterns, they are fairly non-migratory in the States, sometimes ranging further south in the colder months and further north in warmer months.
887471
they can!!!!!! just short distances.   ever try to catch one:) it will fly!!!!
718848
http://en.wikipedia.org/wiki/Bird_flight
400216
It depends on windspeed and direction, and the planes direction in relavence to that speed and direction. It depends on the speed of the plane. It depends on the density of the object, because of wind resistance. EX. feather would be close, lead ball would be further. Your question is like me saying, "I am in a car, how long will it take me to get to McDonalds?" Not enough info
1050300
It was a swallow....\n\n\nArthur: The swallow may fly south with the sun or the house martin or the plover may seek warmer climes in winter, yet these are not strangers to our land? \nSoldier #1: Are you suggesting coconuts migrate? \nArthur: Not at all. They could be carried. \nSoldier #1: What? A swallow carrying a coconut? \nArthur: It could grip it by the husk! \nSoldier #1: It's not a question of where he grips it! It's a simple question of weight ratios! A five ounce bird could not carry a one pound coconut. \nArthur: Well, it doesn't matter. Will you go and tell your master that Arthur from the Court of Camelot is here? \nSoldier #1: Listen. In order to maintain air-speed velocity, a swallow needs to beat its wings forty-three times every second, right? \nArthur: Please! \nSoldier #1: Am I right? \nArthur: I'm not interested! \nSoldier #2: It could be carried by an African swallow! \nSoldier #1: Oh, yeah, an African swallow maybe, but not a European swallow. That's my point. \nSoldier #2: Oh, yeah, I agree with that. \nArthur: Will you ask your master if he wants to join my court at Camelot?! \nSoldier #1: But then of course a-- African swallows are non-migratory. \nSoldier #2: Oh, yeah... \nSoldier #1: So, they couldn't bring a coconut back anyway... \n[clop clop clop]\nSoldier #2: Wait a minute! Supposing two swallows carried it together? \nSoldier #1: No, they'd have to have it on a line. \nSoldier #2: Well, simple! They'd just use a strand of creeper! \nSoldier #1: What, held under the dorsal guiding feathers? \nSoldier #2: Well, why not?
576717
for a flow in electricity to occur, there has to be a change in voltage.  the bird is touching only one line a very short distance apart.  as there is no difference in voltage between the two points, there can be no traveling of current through the bird.  \n\nalso, the wire offers less resistance to travel than does the bird.  if the roles were reversed, the bird would carry the current.  \n\nand lastly, the wire is insulated.  it's not just bare metal.  this protects the birds and squirrels from the fatal charge.