why do bats hang upside down?
481041
Bats have a distinctive system of tendons in their legs and when they hang upside down, the tendons pulls the claws together, which gives the bat grip. The heavier the bat is, the harder the tendons will pull on the claws, and the better the grip will be. So by hanging upside down, a bat can hold onto a branch, the side of a wall, or the ceiling of a cave without having to remember to grip. Therefore it sleeps or hangs upside down(just like an umbrella hanging from a peg).
1027450
Sure, except I believe that "upside down" would be two words.  To keep eggs fresh without refrigeration you need to turn them every few days, so sometimes they'd be "right side up"  and sometimes they'd be "upside down".   Just a bit of trivia ...
1088912
Walking upside-down requires a careful balance of adhesion and weight, and specialized trekking tools to combat the constant tug of gravity.\nEach fly foot has two fat footpads that give the insect plenty of surface area with which to cling. The adhesive pads on the feet, called pulvilli, come equipped with tiny hairs that have spatula-like tips. These hairs are called setae.\nScientists once thought that the curved shape of the hairs suggested that flies used them to grip onto the ceiling. In fact, the hairs produce a glue-like substance made of sugars and oils.\nFlies need sticky feet to walk on ceilings, but not so sticky that they get stuck upside down. So each foot comes with a pair of claws that help hoist the gooey foot off the wall.\nFlies use several different techniques to get unstuck: pushing, twisting, and peeling its footpads free.\nThe combination of the feet hairs' rounded tips, the oily fluid, and a four-feet-on-the-floor rule help the inverted insect take steps in the right direction.
1095420
When you naturally hit to the opposite field, it is considered to be very good, as it is much easier to learn to pull the ball than to learn to go the other way.  First thing is to check your stance.  If your back leg is further back from your front leg, this will shoot the ball to the opposite side.  Evening your legs out will help.  Make sure that when you swing, your knuckles are aligned, because if they aren't you will always hit to the opposite field. (Plus it saps all of your power!!! ALWAYS align your knuckles.)  Other than that, make a conscious effort to pull the ball by not trailing the head of the bat behind your hands.  Hope this helps.
584233
A Flying bat on a red background
446889
because a bat is a symbol of fear, and secrecy.
912779
I suspect it's something simple.  I think because of the way your arm joints work, when you release the board with your right hand, for example, the board will have a very slight horizontal inclination to the left, which will eventually cause it to turn in the air and veer to the left.\n\nIt will be interesting to hear what someone with a knowledge of biology or physics will say though.  :)
64150
upside down as pigs fly by.
18257
you were correct.  It appears that the howstuffworks diagram showing the bicycle mentioned in another answer is in error in that the bicycle would be upside down as shown but the tires and handlebars should not be reversed the way shown.  For example if you are looking at a nearby shrub and a distant tree, both would be upsidedown on your retina.  But the order of objects would be tree, shrub, focal point of eye, shrub image then tree image.\n\nAn experiment was conducted where people wore special glasses that inverted objects as the eye does.  After a while they learned to see correctly again and when they took the glasses off everything was inverted until they re-learned to see correctly once again.
1154947
Although bats are not necessarily blind, their eyesight is very blurry and indistinct.  They can not distinguish stationary objects, only moving ones. So essentially, their vision is useful as nothing more than a motion detector. To compensate for this short-coming, they use an alternate sense, hearing.  They emit sound waves that bounce off objects and return to their ears, allowing them to formulate a picture in their minds based on how quickly the echo returns to them.
594696
Assuming you mean - in general why do elephants testis etc. not hang away from their body.\n\nThe answer is basically because it prevents them from being damaged while walking (being dragged), or from predators leaping up towards the animal.\n\nBecause we stand on two legs we're more readily prepared to fight whatever comes at us from the front.\n\nOther animals on fours have no underbelly protection so they pull in the testis in an adaptive way which basically protects their species ability to reproduce.\n\n\n----\nHope this helps you.\nEnjoy zoology, I hear it's terribly hard.
931675
To give them more stability.  Their roots are not very deep so the tree could be top heavy when fully grown.  The base gives the palm bottom weight and therefore balances the top weight, especially when it is laden with fruit.
111166
When they fly into a ceiling, their feet stick on the ceiling same as with a wall. Flies, like all insects have 6 legs, 2 in the "front" and 4 in the "rear" --\napproximately. As the fly approaches the ceiling, it "reaches up overhead"\nand grips the ceiling with its two front legs. It's forward momentum carries the rest of the fly in the direction of flight. It then does a "180 degree"\nflip planting its 4 rear legs on the ceiling, landing in the opposite direction as the initial direction of flight.\n\nThis is not as bizarre as it sounds. Human gymnasts on the uneven bars perform similar trajectories in some of their exercises.
308635
Do you mean a bicycle riding bat? They tend to live longer than other bats because they're keeping fit in one of the most aerobic ways.\n\nHowever, bats do find it difficult to stay in the saddle at speed - this is because they have to spread their wings in order to grip the handlebars - thus as speed builds up they tend to take off. This is why you don't see many cycling bats, most tend to prefer rowing or sailing.
978570
That sounds reasonable. Bats generally come out of the caves at night and they are pollinators. The scented nectar may attract them. If not bats, other nocturnal pollinators will be attracted.
882829
Because they are predators. Animals which do not rely so much on their hearing for hunting tend to have ears that are positioned to pick up sound equally well through 360 degrees as an early warning system.
918668
normally bats are nocturnal,,,,normally there most of the activities are in night,,,,,,, but they do fly in day,,,,,,, only for migration becoz they cannot tolerate extreme cold temperature,,,,, they can migrate in day for better habitat