Spider Eggs

Argiope spider egg sac
Argiope spider egg sac

Argiope egg

Spiders, just like other arthropods produce egg sacs to increase their population. The majority of spider types make their egg sacs from silk in a loosely woven form, which helps them easily spin webs. These sacs have the size similar to that of the spider itself. Similar to spiders, other insects, including moths also use silk to spin their cocoons in their reproductive stage. The cocoons of the moths resemble the spider eggs sacs to a great extent. Spiders can catch their prey and other insects in their webs made up of silk easily. Their prey caught in the web also looks like their own egg sac though in reality, they are not. The spiders can live for a few months to at most two years. But there are a few exceptions where spiders have been able to live up to twenty years. The spiders that have been able to live more than twenty years are those who have lived in captivity.

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Identification of Spider Eggs

The identification of spider eggs is very difficult because you cannot simply recognize the spider eggs just by examining the nymphs, as these nymphs are very small in size. At the same time, some basic knowledge and information about the description of the spider sacs are helpful in determining the particular type of spider species it will become.

Wasp egg sac

The process of identification of the spider eggs involves two parts. First, you need to carefully examine the spider egg sac you are looking at. You need to see the shape and the texture of the egg sac present. The spider egg sac is made up of silk webbing. But this silk webbing is different for different types of spiders. It is different in terms of the shape and the texture. Common shapes of the spider eggs include the egg sac being a round ball, a disc with a round part in the middle, fluffy mass of silk, squishy pillow or a ball with spikes on it. Then you need to observe the size of the egg sac. The size of the egg sac of a spider is smaller than a quarter. The observation of the egg sac is important, as it helps you see whether the sac is a spider egg sac or not. If something is seen equivalent to the size of soccer balls, it is definitely not a spider egg sac. On the other hand, if there’s something found that’s equivalent to the size of the golf balls, then it might be a spider egg sac for sure. Some spiders make just one egg sac, while others make several of them. The next step involves looking at the color of the spider egg sac. The majority of spider egg sacs are white or an off-white color, but few of them can be of yellow, brown, or yellowish green. But if you see an egg sac of pink or black color, it is definitely not a spider egg sac. The next important thing to look for is the location where the spiders lay their egg sacs. The majority of the spiders lay their egg sacs in their webs or attaches their egg sacs to a wall with a silk form of webbing. In few cases, the spiders lay their egg sacs on the ground, which may be difficult to view due to the silk webbing. Furthermore, you should also check for baby spiders’ presence as this will indicate that there are spider egg sacs also present.

Black yellow garden egg sac

The second part involves observing the spider web. Various different forms of the spiders have different patterns of their webs. In all cases, spider webs cannot be observed, as some of the spiders do not lay their egg sacs in the web. But if you are able to recognize the type of spider present, you can for its web, too. Most of the spider web patterns include circular patterned webs, messy shaped fluffy webs, funnel webs, sheet webs, bowl-shaped webs, wooly webs or sticky webs. Moreover, spider webs are made in many locations, such as in the corner of the wall, in the hole of the brick wall, a tree or in a pile of some dead leaves. By looking at the location of the spider webs, you can narrow down your possibilities of the various spider web types. Most of the spider egg sacs of different spiders are more or less similar to each other. So it’s difficult to identify what type of spider egg sac it is if you do not see the particular spider laying their eggs. While if you see the particular spider laying eggs, you can easily identify the spider. You should also consider the different patterns, colors, and styles of the various different kinds of spiders. Some of the common colors of spiders, such as black, brown and yellow color are easy to be identified. The detailing of the spider structure should be carefully examined, also, such as color shades, marking, etc. Spiders are also covered with small hairs, which are difficult to come into notice always. Few types of spiders, such as bold jumping spiders have hair which is visible from a long distance. The last thing to notice is the size of the spiders. Knowing the exact size of the spiders will help you identify the type of that spider. The size can be measured by comparing it with the normal day to day use things, such as a golf ball, pencil eraser, fist or a quarter. The size of the spiders can also be measured in terms of measuring scale in inches and centimeters.

Bold jumping spider

The two most common types of spider egg sac are as followed: these two types of spiders are also the most dangerous ones. The first of the dangerous types of spiders is the Black Widow spider, whose eggs are also dangerous, too. Black widow eggThe size of the Black Widow spiders’ egg sacs is small and equivalent to the size of a pencil eraser. Moreover, their webs are also not neat and messy. They can lay about 400 eggs, which are randomly placed on the web and not in any particular order. On the other hand, the second dangerous spider is the Brown Recluse spider. Their egg sacs are most commonly found in late springtime to summertime. So you are likely to see their egg sacs from April to September. The common color of the Brown Recluse spider egg sacs is off white to tan. The shape of these egg sacs can be round or cone shaped. One brown recluse egg sac has the capacity to store 300 eggs inside of it.

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Eggs of poisonous/dangerous spiders

There are several different types of spiders that are harmful/poisonous and nonpoisonous /not harmful ones. Normally, when a single egg sac produced, a spider is able to have about a hundred eggs of its kind. Thus a single egg sac can be very dangerous, especially if it is of dangerous spiders. The egg sac of a dangerous spider containing many spider eggs must be immediately destroyed to prevent the increase of dangerous spiders. Different spider egg images can be viewed to get an idea of how they exactly look like. If one sees them anywhere, they should be immediately destroyed.

Poisonous loxosceles laeta

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Lifecycle and Reproduction

The reproductive cycle of the spiders is very unique and interesting. They follow the process of metamorphosis to reproduce their offspring. They mainly have three stages of their reproductive cycle. These three main stages include egg, nymph, and adult.

Spiders mating

All spider species reproduce through the process of sex and fertilization. But the fertilization in spiders occurs only internally and it is not direct. This means that the sperm from the male is not inserted into the female spider’s body by the male spider’s genital, but by some other middle-level stage. Male spiders, unlike other anthropods which live on land do not have the ability to produce ready-made spermatophores, which are basically packages of sperms. Instead, the male spiders first spin small sperm webs. In these sperm webs, they ejaculate after which the sperm is then transmitted into a syringe-shaped structure known as papal bulbs or papal organs found in the tips of the pedipalps of mature male spiders. When the male spider detects any signal of the presence of a female spider in near vicinity. It checks whether the female spider is part the same species as he is. It also checks for the consent of the female spider to mate with it or not. For instance, taking the example of the spider species which produces only webs or ‘safety ropes’. The male spider can recognize the species and the gender of the spider just by the smell of it. Thus, various types of spiders have different abilities to recognize various spiders.

Jumping spider eggs

According to research, spiders are known for developing relation of courtship in order to protect their small males from being eaten up by the large females before the process of fertilization. Exceptions include cases where the small male is so small that it is not worth being eaten up by the large females. After various practices of making the courtship – a successful one. The male spider injects the sperm from the papal bulbs into the female genital opening. Female reproductive tracts vary from simple tubes to complicated systems where female spiders can even store the sperms and release them when they are ready to do so. Females spiders have the tendency to lay approximately 3000 eggs in just one or more egg silk sacs. These egg sacs maintain a constant humidity level as required. Research has shown that in some spider species, females die after laying the eggs but in other cases, the female spiders protect the sacs. The females protect the sacs by being attached to their respective webs, hiding the sacs in the nests, carrying them in the chelicerae or attaching the sacs in the spinnerets and dragging them along wherever they go.

All baby spiders pass all their larval stages inside the egg and finally hatch as spiderlings. These spiderlings are basically very small in size and sexually very immature. But they have the full structure of the adult spiders. Some spider species are to a great extent concerned about their young spiders. An example of a caring spider is the Wolf spider. The young spider of this species clings to the rough bristles on the mother’s back. On the other hand, females of some species respond to care for the young ones by providing them with their prey in situations where it is not struggling for food. Similar to other anthropods, the spiders have to molt in order to grow, as their skin lacks the capacity to stretch itself. It has been seen that some of the male species like to mate with the newly molted females, as they are very weak and cannot threaten the males. They are not harmful or dangerous for the males. The life expectancy of most of the spiders is just one or two years. But some spiders have been able to live for more than twenty years, provided they have been in captivity.

Tarantula spider spiderlings

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As there are various different types of spider species, they all behave differently while placing their egg sacs. They place their egg sacs in different places depending on their different types. There are a number of different locations where spiders place their egg sacs. Some of these locations include the spider web itself. Along with the side of the leaves which are attached to the tree branches or the leaves in a burrow. Some of these egg sacs can also be found in the quiet and undisturbed areas outside houses. Some spiders, which are very protective of their egg sacs carry them along their skin. This way, they can protect their egg sacs from any external attack.

Garden spider egg

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Control of Egg spiders

At times, it is very difficult to get rid of the spiders and the spider eggs because they usually make their homes in areas where much of human activity is not present. The spiders make their homes in places where there is less noise and fewer disturbances. Such places are secretive and examples include the basement or the attics. The most common spiders found around houses inside and outside are easy to be killed by normal pest sprays or wrapping a tissue around the spiders. These spiders are not very harmful. On the other hand, some spiders are very harmful and can lead to poisonous bites. So precautionary measures need to be taken to deal with them safely. As you are not sure of what type of spider you are dealing with, precautionary steps are essential to be taken.

When you are able to recognize for dangerous spiders, such as a Black Widow spider or Brown Recluse spider, you should immediately get rid of them. They cause great pain if one gets bitten by them. In order to get rid of them, professional pest control people should be contacted. In extreme situations, if the spider unfortunately bites you, immediate medical attention should be sought.


Furthermore, to have full control of the spiders and their eggs, the following precautionary steps need to be followed. First, all daily household trash, garbage, bricks and lumber piles should be kept neat and tidy, even in the outdoors. As if these things are not kept neat and tidy, spiders are most likely to make their homes there. Moreover, trees should be trimmed regularly to make the least possible contact with houses. These trees are not just good places for spiders to reside in only. But to have an easy way into the home and at the same time, hide in as well.

The garbage should not only be cleaned from outside the house. But inside the house should also be kept clean and tidy. Inside the houses, the store and basements should be kept clean, as these are places for spiders to hide in. Any spider web found should be removed with a broom or a vacuum cleaner. As spiders belong to the family of insects, they prefer making their homes where other insects reside. So the household should be insect-free overall. This will prevent spiders from making their homes. Furthermore, it is recommended that if you see any spider egg sac web, you should immediately destroy it. There is a great need to immediately destroy them as one spider egg sac web may contain hundreds of spider eggs, which can hatch in about two or three weeks at maximum from the time they were deposited.

Though we cannot get rid of insects, including spiders and completely stop them from increasing their population around, certain precautionary measures can help reduce their burden on our mother earth. Thus these should be followed on a regular basis to get the most desired outcomes.

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