How Long Is A Spider Pregnant For?

How Do Spiders Reproduce: by Live Birth or by Eggs?

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If you get the heebie-jeebies thinking about spiders, you’ll be sorry to hear that over 40,000 species of arachnids live in the world. Don’t feel too bad, because only a few are harmful to humans, according to the University of Florida Entomology Department. Spiders reproduce by laying their eggs in a sac. Female spiders can carry the egg sac wherever they go or deposit it in a web.


A male spider displays several behaviors during courtship, hoping the female will accept his sperm. These behaviors include pulling on the web, rocking his body, pushing the female’s legs, vibrating his abdomen, tapping on the web, making rolling motions with his palps (which protrude from his mouth and are sometimes mistaken for legs) and tapping the female spider.


A male spider deposits his sperm into a sperm web, holding it in his palps. Then he cautiously approaches a female spider. The male spider deposits the sperm into an opening on the underside of the female spider’s abdomen. The female fertilizes her eggs with the stored sperm and then lays them into an egg sac. She can hold the sperm of several different males in her spermatheca, which is the internal sperm storage area. Female spiders will sometimes eat the smaller males during mating.

Egg Sac

Spiders make their egg sacs with silken threads shaped like a ball. The spider disperses the threads through spinnerets near the bottom of the abdomen. The threads are in a liquid form when secreted and become solid when released into the air. Spiders use these threads not only to form egg sacs but also to build webs and nests, and for travel. The egg sacs can contain hundreds of eggs. After about two to three weeks, the eggs hatch into live spiders. It takes about one year for the hatchlings to reach adulthood.


Tiny hatchling spiders, known as spiderlings, immediately begin traveling away from the egg sac. Spiderlings climb to the top of a branch or grass, then produce silken threads. Wind catches the threads and carries the hatchling spiders over long distances, where they colonize habitats far from their birthplace. This dispersion of hatchling is known as ballooning. Whether walking or ballooning, many of these baby spiders become prey to birds, other spiders, wasps and insecticides.

How Spiders Work

Spider Sex

The male spider’s primary objective in life is to impregnate one or more female spiders before other males can. As it turns out, this is no easy task in most species.

The first obstacle is actually finding a female spider. Most spider species are completely solitary animals, meaning they live and feed on their own, and they are generally spread out over a wide area, making an available female relatively scarce. The male spider has the daunting task of tracking down a sexually mature, receptive female in the area before other males can get there.

In most species, the female makes it easier on the males by «advertising» herself with pheromones, communicative chemicals. Many female ground spiders will secrete a pheromone on their dragline, the silk thread they leave trailing behind them. When males of the same species come across the dragline, they smell the pheromone with the chemical sensors on their front legs and follow the dragline to the female.

Web-spinning females may release pheromones directly into the air or coat their webs with pheromones, to make a natural «chemical antenna.» Males may also stake out developing, sexually immature female spiders, so they can be the first to mate after the spider’s final molt.

Once the male locates a female, it has to contend with any other males in the area. In species where the female spins a pheromone-coated web, the male’s first order of business is to destroy the web to cut off the signal attracting any other males. If other males are present, the spiders in most species will fight it out for the right to copulate with the female.

After taking care of any other male contenders, the spider’s next task is to deal with the female spider itself. Male spiders are generally much smaller than females in their species, making them easy prey. The male has to signal to the female that it is a spider of the same species, not food or a potential predator, and that it intends to copulate. This is courtship.

Courtship varies considerably among different species. Many web-building spiders will use vibration as a means of courtship communication. The male may strum a unique signal on a thread connected to the female’s web to identify itself and get across its intentions. Many spiders with better eyesight, such as various wolf spiders and jumping spiders, will «dance» to court the female.

Once the female recognizes the male’s courtship behavior, she will position herself for sex, signaling to the male that she is receptive, or she will make it clear that she is not receptive (by shaking her web, for example, or just crawling away). If the male is desperate to mate, because all the females in the area will soon lay their eggs, he may proceed anyway, with full understanding that the female might kill him.

Both the male and female reproductive organs are at the rear of the abdomen, but spiders don’t mate by coupling these organs. Instead, the male deposits some sperm onto a small web and picks it up on the end of his pedipalps. When the female is in position, the male deposits the sperm in the female’s genital opening. The female stores the sperm in receptacles near the ovaries. When she is ready to lay her eggs, months down the road in some species, she uses the sperm to fertilize them. Some spiders may lay hundreds, even thousands of eggs in one shot.

See also:  What Kind Of Insects Do Spiders Eat?

In the next section, we’ll look at what happens once the eggs are fertilized.



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Spider Reproduction and Life Cycle

Spider Reproduction

Spiders give off a very powerful type of chemical when they are ready to mate. The males go in search of the males in order to be able to mate with them. They are able to tell not only if the female is ready to mate but if she is of the same species by the chemicals she gives off.

Many times they will find newly molted females because they are weak. They aren’t going to be very dangerous to a male who is looking to mate with her. Some species have to be more careful about this than others.

Elaborate courtship to prevent the males from being eaten before mating has been successful. Sometimes the female will kill the male and other times she won’t. It is hard to understand what the process is for that decision to be made. Part of these rituals involve the male vibrating the web. If they are able to calm her enough then she will be less likely to take part in aggressive behaviors.

Some species of Spiders also take part in dancing or elaborate moving for courtships. The females often don’t accept the males for mating though and will kill them or run them off. They can be very aggressive during this period of time. It isn’t fully understood why they refuse to make with some males but will with others. Size doesn’t seem to be the only factor that will determine who she will mate with.

The reproduction cycle of the Spider is very different from what many would expect. Mating doesn’t require male and female sperm and egg to match. Sperm is placed on webs and then transferred to the tips of the females. For some species of Spiders though the ritual will end with the male being consumed by the female. There isn’t any real understanding why this is part of their natural survival instincts.

However, this isn’t the case with all Spider species but many people often place that statement on all of them. There are really only a handful of them that follow such rituals and routines.

There are also species of Spiders where the females will die soon after she lays the eggs. Others carry them with her and they will start to emerge but when they so she will die. The circle of life for the Spiders can be very complex to understand.

This is why there is often a myth that the young are never cared for by their mothers. However, some species of Spiders do care for their young. They are very good at doing so which is also interesting to observe. Yet we don’t have a great deal of information about that bonding period. It is more likely that they will be doing more with meeting their needs than with being able to develop strong relationships with them.

Up to 3,000 eggs for some species can be deposited into the egg sac. The young will remain in the egg until they are ready to hatch. When they emerge they are miniature versions of the adult species. Yet there is on a chance for a very small amount of them to be able to survive to the age of maturity. This is why there survival mechanisms involve them offering many offspring at once.

The average life cycle of a Spider in the wild is 3 years. This is due to the various mating rituals. However, in captivity they may not be able to mate. This can be a reason why they are able to live many years longer. The overall life cycle can be very different based on a given species. For example there are Tarantulas in captivity that have survived for more than 22 years.

KidZone Spider Facts

Spiders are serious predators so mating can be a bit dangerous especially for the males. Male spiders have to be careful when meeting the female. Using his claws he will send gentle, even vibrations through the web, unlike the quick, jerky movements of scared insects. This announces his arrival, but he still has to convince the female that she shouldn’t eat him. Male Jumping spiders will do a dance to show the female why he is there and the male Wolf spider will wave his hairy front legs. The male Nursery Web spider (being quite a gentleman) will wrap an insect in his silk and give it to the female as a gift! If the female chooses NOT to eat him she will mate with him. After mating she may still decide to eat him before he gets away. Tough date!! Good news: this is not too common.

Spiders will lay between 2 and 1000 eggs, depending on the species. Almost all female spiders protect their eggs by making a silk ‘bed’ and then covering them with a silk ’blanket’. She then wraps them in more silk to make the egg sac. She hangs the sac someplace safe and guards it until the babies hatch. When the babies hatch they often stay inside the sac to finish developing. Some mother’s stay until the spiderlings leave the sac, others will either leave or die before seeing their babies.

See also:  What Does A Wolf Spider Bite Look Like?

The Wolf spider is a super-mom! She will attach the egg sac to spinnerets and carry the sac with her until the eggs hatch. Once the babies are born they climb onto her back and stay there until they are fully developed, living off their egg yolks (from their egg). This could take weeks. They go everywhere with her, including hunting. If one falls off, mom will stop what she is doing until it is back on top!

Comb-footed spiders will feed their spiderlings liquid from their mouths.

Many spiders will go off on their own after their eggs hatch, leaving the babies to fend for themselves.

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How Long Do Spiders Live?

A look at the life cycle

How long do spiders live? This answer can vary depending on the type of spider. There are more than 38,000 different spider species, many of which have very different breeding habits. But despite their differences, there are a few aspects of the spider life cycle that all spiders share.

What is the spider life cycle?

Spiders begin their lives in egg sacs. The amount of eggs per sac depends on the type of spider, ranging from one egg to thousands of eggs. Female spiders defend these eggs in different ways. Some carry the sac with them, some leave them in a defensive zone where they can easily protect them, and some leave the eggs to their own fate.

Egg development can take anywhere from a couple of weeks to an entire winter season. Once hatched, the spiders disperse by walking away or ballooning. When a spider balloons, it produces strands of silk that form into a triangular-shaped pouch, sometimes called a “kite.” The spider uses this “kite” to be lifted into the air and transported to a new home.

To reproduce, a male spider spins a special web to catch his sperm and transfers it to his pedipalps, a second pair of appendages that function as sensory organs. He then goes in search of a female of the same species who is ready to mate. Some spider courtship involves the male performing intricate dances to prevent the female from having her mate as a meal instead.

How long do spiders live?

The spider lifespan can vary as much as the spider life cycle. Most spiders live about two years, but some have been known to live up to 20 years when in captivity. Female spiders tend to live longer than male spiders. Many male spiders reach maturity within two years and die after mating. This is mostly because female spiders eat them; however, there are some species of male spiders that die an obligatory death from the mating process alone.

Female spiders have a large impact on the lifespan of their male counterparts. Terminix® can make an impact on any spider lifespan. If you have a spider infestation in your home, call Terminix today.





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Spider people- how do you tell if a spider is pregnant?

Spider people- how do you tell if a spider is pregnant?

Spiders aren’t viviparous, they are oviparous. What this means is that they don’t get pregnant (the babies won’t develop inside her), they lay eggs. They produce a structure called an «Egg Sac» that holds the hundreds and hundreds of eggs, that will then hatch into spiderlings.

A cool behavior from wolf spiders is that since they do not make webs, they carry their egg sacs attached to their spinnerets (butts), and they also carry the babies

This jumping spider M. penicillatus has a different shaped egg sac/nest too. This one is a male protecting the eggs. There are lots of different egg sacs, I don’t know them all obviously, but most, especially cobweb spider egg sacs, are round.

When the female spider is carrying eggs, her abdomen becomes distended. Although a spider’s abdomen also varies in shape and size depending on how recently it has fed, with experience you can often determine whether the abdomen is bigger than «normal» for the species.

Of course, once you see the mother make an egg sac, it is very obvious. 🙂

A female that is carrying eggs is «gravid.»

Is your flair a lotr reference or am I just stupid and it is a reference to something else?

there is no real way to tell..most is best guess. and that is usually determined by 2 things. 1 is the spider female, 2 the size of the abdomen. sometimes it can just be a fat female, but a really fat spider in the wild is rare, but it does happen.

Spider Eggs in the House: What do You Need to Know?

Most household spiders are harmless to humans and prefer to feast on bugs rather than people. And once these spiders move into your home, they soon begin laying eggs. Here are some things you should know to help avoid a spider infestation — and some telltale signs to be on the lookout for.

Spider eggs

Spiders living in your home can lay many eggs very quickly. A female spider wraps her young in a silken egg sac, which she may hide in a web or carry with her as she forages through your house. Female brown and black widow spiders can produce 10 to 20 egg sacs in their lifetime, each containing 150 to 300 eggs. However, the survival rate for these eggs is low.

Spider eggs typically hatch in 2 to 3 weeks, which can vary based on species and season. Once spiderlings fully emerge, they usually settle close to the nest area for several weeks before moving on and staking out their own territory.

Helping get rid of spider eggs in the house

Taking measures to help keep your home free of egg sacs and the spiderlings they contain is an effective way to help avoid an infestation. Luckily, there are several simple methods for helping remove or eliminate spider eggs you may find within your home.

See also:  How Long Can Spider Bite Symptoms Last?

Spider eggs are fragile and can be removed with a broom or vacuum cleaner. If using a vacuum, remove the bag after each cleaning and dispose of the debris, including the eggs, in a sealed plastic bag. When sweeping up spider eggs, try to make sure that no spiderlings have escaped the dustpan before you seal the eggs in a plastic bag.

You can also use glue traps available at your local market or hardware store to help get rid of any spiders you discover in your house. Follow the manufacturer’s instructions carefully and only use these products safely out of the reach of children and pets.

Helping keep new spiders from moving in

To help discourage new spiders from building nests inside your home, reduce clutter in and around your property as much as possible.

  • Place backyard woodpiles, mulch, rocks and compost well away from the home.
  • Store items, such as gardening gloves, clothes and sports equipment, in sealed plastic bags that will help keep spiders out.
  • Carefully inspect your attic and crawl space and clear out spider webs and eggs wherever you find them.

If you have taken steps to remove spider eggs in your house but the problem persists, or you want the help of a trained professional from the start, contact the pest control professionals at Terminix®.

The Best Mouse Trap Method

Everyone has seen the cartoon mouse trap: A big wedge of cheese perched precariously on a small wooden rectangle, just waiting for an unsuspecting mouse to come along. Most modern mouse traps don’t use pieces of cheese, although they can still use food as bait. One of the most popular baits, believe it or not, is peanut butter. There are still versions of the snap trap from cartoons, but there are also other kinds like electronic traps. Because these traps usually mean dealing with dead mice, plenty of people wonder if there’s a way to help get rid of mice without classic mouse traps. Although mouse traps are the most effective in helping to get of mice, you can also try the following natural methods to see if they help remove these pesky rodents.

How to Help Remove Fruit Flies from Your Home

Fruit flies are one of the most common household pests and they can be a huge nuisance for homeowners. Not only that, but researchers have found that fruit flies can “transfer bacteria from a contaminated source, food, or waste to surfaces or ready-to-eat food.

Control Yard Invasions: Gophers, Moles, and Voles

Any homeowner with a yard runs the risk of having their lawn terrorized by burrowing animals. Gophers and moles are animals that can cause extensive damage to a yard by digging complex networks of tunnels below ground. While these pests are most likely to be active in the spring and summer when the soil is most malleable, they remain active in the winter by burrowing even further into the ground to escape the colder temperatures. Voles can also cause lawn damage with their runways. Though it may be hard to tell these pests apart, knowing what each animal looks like and how they cause damage can help you practice the best gopher, mole and vole control methods and protect your home’s yard.

How to Naturally Get Rid of Bugs on Plants

Buying houseplants can put you at risk for harboring unwanted pest infestations. Before these bugs cause damage to your new plant, know how to take care of them using natural remedies.

How to Help Prevent Mosquito Bites

Itchy bites and illness may occur after exposure to some arthropods such as mosquitoes and ticks. The bites can cause discomfort and, in some cases, transmit pathogens (bacteria, viruses and protozoans) that can cause a variety of diseases. Some examples of diseases that are of concern in the United States include: (mosquito) chikungunya, dengue, La Crosse encephalitis, West Nile fever, Zika; (tick) Lyme disease and Rocky Mountain spotted fever. The good news? There are many precautions you can take to help avoid bites from mosquitoes and ticks.

How to Get Rid of Ticks in the Yard


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5 Surprising Spider Abilities You Should Know About

Spiders. Those eight-legged arachnids. Who needs them? Sure, they eat pests like flies and mosquitoes, but what’s so special about that? Well, take a closer look at these little creatures, and you’ll discover there’s more to them than meets the eye.

Can Spiders Harm Your Pets?

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How Big is a Brown Recluse?

Because the brown recluse is so hyped up and feared by many people, you might expect it to be massive with legs that can cross city limits. But these spiders are actually pretty small.

Are House Spiders More Common in the Winter?

It’s a commonly accepted myth: Spiders flock to our houses in the fall to escape the coming cold of winter. But this notion is just that, a myth. Spiders generally don’t infest your house more in the winter.

Are Wolf Spiders Poisonous?

While wolf spiders may be an intimidating threat to other insects, are they dangerous to people?


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