Why do some caterpillars hand from webs?
829521
Many different types of tree-leaf feeding caterpillars do this; there are at least two reasons. As forex says - if a predator, like a spider, approaches, some species drop on a line of silk to avoid getting eaten. At other times and with other types of caterpillars, they dangle on a line because they're ready to turn into moths. They need a safer place to make a cocoon and pupate so they dangle until it feels right and then, hopefully, the wind will blow them into a lower, warmer and safer place to spend the winter in their cocoon. In the spring, they turn into moths and lay eggs on the leaves of the same type of tree that they grew up on. They’re usually small moths that nobody ever sees - unless they look. They spin silk from modified salivary glands which secrete a strong, elastic thread through spinnerets right next to their mouths; it’s similar to spider silk but their own recipe.
1149111
Yes, I did. I kept caterpillars in an empy butter container (with holes) of course and it went very well. My teacher even gave me an award for doing it. :)
380789
Since you put this in the religious section.\nGod created caterpillars.
1058524
"won't you come into my parlor?",said the spider to the fly. the tricky spider is pretty clever,isn't he? he knows the fly will be caught and he'll be able to scamper along and have himself a nice meal!\n       but if the sticky web clings to the fly and traps him,why doesn't it cling to the spider? the answer to this will surprise you. it does! a spider can be caught just as easily in his own web as a fly is.\n       the reason this doesn't happen is that the spider is "at home" in his own web. he knows his way around. and when the web was spun originally, the spider made sure that there would be "safe" threads to use, threads he could touch without sticking to them.\n      there are many kinds of silk that a spider produces. the sticky kind is used in the web to catch its prey. but there is also a non-sticky kind, and this is used to make the strong, supporting spokes of the web. the spider knows which is which, and he simply avoids the sticky ones! he can do this because he has a remarkable sense of touch.
1167191
Well first off you can forget the myth that the female spider eats the male. Very occasionally in a handful of species the female will eat the male after mating, but it is the exception, not the rule, and it never occurs in most spider species.\n\nAs for webs, most male spiders do indeed spin webs.  In a small number of species the males are essentially parasitic on the female webs, hanging arund the edges eating insects that are too small to attract the notice of the much larger female.
1062460
It varies with the kind of spider, of course many of\nthem don't build webs at all.  From a few minutes\nto an hour or so would cover most of them.  There\nare some that build communal webs that may\ncontinue to expand for days or even years, it\ndepends on how many spiders are in them.
734919
insect crawls and bug can fly
925767
Many spider families including Pisauridae and Lycosidae spend lengthy amounts of time with their offspring. Nursery web spiders will carry the egg sac in their fangs sometimes for more than a month and then they will attach the eggs to some sort of substrate and wait nearby t protect them until the young hatch and leave the nest.\nWolf spiders will carry the eggs on their abdomen until the young hatch, then they will crawl around on the mother's back unitl they are ready to leave and then they just drop off as they please.\nOther web building spiders will keep the egg sac in the nest but dont really dedicate any time to guarding or transporting them, their presence alone and a very large sticky web are usually enough to keep any would-be predators away.\n\nhope this answers your question!
266827
Nice question, it has been asked before. \nI'll quote myself:\n"Because of the way their legs are built.\nThe tendons in bird's legs are arranged as a pulley-rope system so that the weight of the animal pulls on these tendons and keeps their fingers closed at rest. Thus they do not require voluntary muscle action to maintain their grasp on branches.\nThis is specially characteristic of songbirds. Others may rely on nests, platforms or other types of dwellings"\nYour canary is a songbird, a member of order Passeriformes. Thus it has these specialized tendon system :-)
659386
You are seeing very small scales come off of their wings.  If you are careful with a moth wing, you can rub the scales off and be left with nearly transparent material.  Butterflies are the same way; if you ever handle on, you are almost guaranteed to have some pigmented scales on your hands afterwards.\n\nOther than that, moths are made of the same stuff other living things are...water, lipids, proteins etc.\n\nHere is a nice page with some microphotography of these scales:\nhttp://www.kendall-bioresearch.co.uk/micro3.htm
855812
I not sure, but, sometimes I play with these fuzzy little spiders as they seem to enjoy it. I poke at them with my finger and they run and then jump on my finger and look around as if they playing. As I look at them they seem to take on a personality that seems to have a face, including a nose. ;-)
751232
The incorrect answer is C. Spiders will NOT accept dead insects. They only eat the fresh ones (otherwise we'd have a lot less dead insects around).\n\nHope this has helped you!
1117171
Very minute claws on the feet that allow them to grip. Some insects actually have a sticky substance on their feet that allows them to stick to surfaces.
1007298
They help control the populations of small arthrapods, either by eating them outright or laying eggs on some things that eat them alive after they hatch. (mosquitos, flies, moths, caterpillars, spiders, smaller wasp species, etc.)\n\nThey in turn become food for birds, spiders and larger predatory insects.
104208
I'm pretty sure on a web only some of the web is sticky. The spider just knows where to put its feet. I think... Or maybe its just the opposite of how a fly lands unside down on the ceiling.
848204
Because males of web-weaving spiders must invade a female's web to mate, it's obvious that this can happen. In addition, there are some species that engage in web takeover and web stealing, this often involves eating the host spider or the host's prey.\n\nOne genus of kleptoparasitic spiders, the Argyrodes, routinely live in other spider's webs and steal prey.\n\nhttp://www.amonline.net.au/factsheets/red_spotted.htm\nhttp://www.americanarachnology.org/JoA_free/JoA_v12_n3/arac_12_3_0363.pdf\nhttp://www.cyberoz.net/city/sekine/zukax105.htm\nhttp://www.americanarachnology.org/JoA_Congress/JoA_v30_n2/arac-30-02-238.pdf
461250
If you see two adult butterflies with their abdomens linked tail-to-tail, they are mating. The male grasps the female and deposits a sperm packet, which fertilizes the female's eggs. The butterflies can fly while mating, but they usually avoid moving unless they are disturbed. \n\nButterflies and moths undergo complete metamorphosis in which they go through four different life stages. \nEgg - A butterfly starts its life as an egg. \nLarva - The larva (caterpillar) hatches from an egg and eats leaves or flowers almost constantly. The caterpillar molts (loses its old skin) many times as it grows. \nPupa - It turns into a pupa (chrysalis); this is a resting stage. \nAdult - A beautiful, flying adult emerges. There is no growth during this stage. This adult will continue the cycle and reproduce.