Nature, Uncategorized

How Much Does a Spider Weigh?

A typical spider weighs less than 1 gram. A large spider like the Goliath bird-eating spider wieghs 175 grams. A tiny spider like Patu digua weighs 1 mg.


Spider sizes

Spider size can be described in terms of its length. The body ranges between 0.5 and 90 mm in length, translating to 0.02 and 3.5 inches in length. The largest know siders are the tarantulas or hairy mygalomorphs. These spiders are usually found in warm climates and can be found in most regions in America.

The goliath bird-eating species in Amazon and pink-foot goliath are among the largest types of tarantulas. The latter is found in the southern parts of Venezuela. The smallest know spiders are found in tropical regions and were first discovered in the 1980s.

Interestingly, female spiders are generally more giant than male spiders. This phenomenon is called sexual size dimorphism in animals. The majority of the female orb-weavers like those in the Araneidae and Tetragnathidae families demonstrate extreme size dimorphism because their females are at least twice the male sizes in the same species.

Experts highlight that the extreme differences in sizes resulted from the selection processes that favored fecundity among the females and the bridging locomotion among the ale spiders.

Spiders use the bridging technique for the construction of the orb web. A spider produces a silk thread that the wind carries to get attached to an object to form a bridge. The smaller sizes of male spiders make the building and traversing processes of the silk much easier and faster than the large-sized and heavier males. Experts believe that smaller sizes for the male spiders give them a greater mating opportunity, which favors selecting their relatively smaller sizes.




There are more than 45000 species of spiders that live all over the world except in Antarctica. Spiders belong to the kingdom Animalia, phylum Arthropoda, and class Arachnida. Spiders have fangs, which they use for injecting venom into their prey.

There are different spider examples, including wolf spider, tarantulas, huntsman spider, widow spider, armed spider, jumping spiders, cellar spiders, and recluse spiders. Besides, golden silk orb spiders, crab spiders, the sac spiders, mygalomorph, fishing, wandering, grass, and missulena are also examples of spiders. There are other spiders like velvet, Sicarius, zoropsidae, trapdoor, agelenidae, linyphiidae, and sicariidae spiders.

Overall, the list of examples of spiders is inexhaustible. However, these are some of the most common examples that you are likely to encounter or hear often.



The weight of a house spider in the UK or US is much little than for spiders in other continents like Australia. Other than the small sizes, these spiders are usually harmless. On average, a spider’s weight is so tiny that you can express it in terms of milligrams.

The weight of a spider could range anywhere between 1milligram and 175 grams. The specific weight in question is affected by the subspecies, age, and gender. This weight is much similar to the weight of a pinch of salt. The little weight of the spiders is one reason they are so quiet and capable of running so fast. Indeed, a spider that makes noise in your house is a cause of alarm because this is an extremely rare phenomenon for such lightweight creatures.

The average weight of the biggest spider is 175 grams, which is 6.2 oz equivalent. The name of the biggest spider is goliath bird eater. The spider eats birds and large creatures like mice. However, it also eats flies and bugs like other smaller spiders. The average length of these spiders is about 12 inches, equivalent to one foot.

On the contrary, Patu Digua is the smallest know spider. The spider is so small that you might not see it even when it is right in front of you. The best method of seeing this spider is by tracking it down on its web. Nevertheless, you will not see it even on this spot because you will just be looking at a small dot. Most people may not tell that the back dot on the web was a spider.

Patu Digua is so tiny that it can sit comfortably on the head of a pin. The width of the spider is about 0.3 mm. which means that the spider is thinner than the thickness of a fingernail. Unlike other species, this spider eats very small insects and larvae. Besides, it can eat baby spiders under the same species.

Many people mistake spiders for insects. Although spiders are invertebrates like insects, they do not have wings like insects or six body parts. Their features of eight legs are similar to those of ticks and scorpions.

Some species are dangerous while others are not. But it is not easy to tell which varieties are safe and unharmful. Therefore, the best thing is to keep off from other spider varieties in as far as you can.

Generally, bright colors such as red patches mean that the spiders are likely to be dangerous. As such, they are a warning sign that a person needs to keep away.

Siders differ from other insects because they have eight legs and two body parts as opposed to insects with six legs and three body parts. They are also popular for using silk in a highly developed manner.

Nevertheless, the appearance and behavior of spiders are highly diverse. Spiders are predators that usually feed on other arthropods, particularly insects.

Some spiders engage in active hunting, allowing them to chase their prey actively and overpower them for food. These types of spiders have a well-developed sense of sight and touch. A different category of spiders tends to weave webs or silk snares for capturing their prey.

Spiders construct webs instinctively. The webs are used for trapping the flying insects for those species that cannot engage in active hunting. After capturing a prey, most spiders will usually inject venom to accelerate its death. Still, there are those the used silk wrapping in helping immobilize their prey. They poop out the waste.

That said, it is good to look at the distinctive features of the spiders, which include size, length, and weight.