What kinds of spiders can you find in Guyana?
Before we begin, I want you to know that the list below is just a fraction of the spider species found in Guyana. Because of the sheer number of these arachnids, it would be impossible to cover them all. For example, some estimates claim over 50,000 kinds of spiders on the planet (and the list is still growing)!
With that being said, I did my best to develop a list of spiders that are MOST often seen, to help you identify what you’ve found.
10 MOST common SPIDERS found in Guyana!
#1. Silver Garden Orbweaver
- Argiope argentata
- Females average 12 mm (0.47 in) long, and males average 4 mm (0.15 in) long.
- They have a silver or white head and abdomen, and the back half of their abdomen is bumpy and dark colored with “windows” of white.
- Their underside is dark brown, their long legs have bands of orange, silver, white, black, or dark brown, and they have two sets of eyes.
Silver Garden Orb Weavers produce seven distinct types of silk. The silks have different compositions, each used for a different purpose when constructing the web.
These webs are incredibly important for the survival of the Silver Garden Orb Weaver because they help with nearly every aspect of their life. For example, they trap food in their web and detect it by feeling the vibration. In addition, the surface of the web collects droplets, and this is their only water source.
These spiders will occasionally bite people in self-defense. However, Silver Garden Orb Weaver venom is not toxic to humans. Bites are typically less severe than a bee sting, with minor redness and swelling.
#2. Golden Silk Spider
- Trichonephila clavipes
- They have reddish-brown and yellow coloring and a yellow oblong abdomen.
- Their legs are long, straight, and yellow, with black bands covered with hair.
- The head is small and grayish-white with black dots that look like a skull.
Golden Silk Spiders in Guyana produce a truly amazing web.
First, the asymmetrical webs of golden-colored silk can be up to 2 m (6.5 ft) in diameter! These clever spiders often construct their webs above garbage, helping to attract insects. Unfortunately, Golden Silk Spiders must repair damage to their webs constantly because birds and large insects are always flying through them.
The silk of this species is also being tested in medical applications. For example, some studies have shown that a piece of silk can connect severed neurons, allowing them to heal properly after injuries. In addition, the silk doesn’t elicit an immune reaction from the body, which means it could be used to help people with paralysis or brain injuries. It sounds like science fiction, but it could be groundbreaking in the future!
#3. Gray Wall Jumping Spider
- Menemerus bivittatus
- This species has a flattened torso and short, thick, greyish-white hair. Tufts of dark brown hair grow close to the eyes.
- The male has a brownish-white stripe on each side of the abdomen and a black dorsal stripe.
- The female has a larger abdomen and is typically lighter brown. In addition, her abdomen is rimmed with broad black stripes that come together at the end.
The Gray Wall Jumping Spider is native to Africa but has spread worldwide. It frequently appears on the exterior of buildings or tree trunks in gardens.
Instead of weaving a web around their prey, the Gray Wall Jumping spider stalks the prey before springing on it to attack. Their wide eyes and visual acuity allow them to focus on objects and distinguish between different colors easily. And, using their exceptional jumping ability, they can seize their prey in the blink of an eye.
Interestingly, male Gray Wall Jumping Spiders can produce sounds as part of courtship behavior. The hairs on their femurs and the teeth on the chelicerae (small claws on the front of the mouth) make clicking noises that attract females. These sounds are too low and quiet for humans to hear, but it isn’t hard to imagine the creepy noise!
#4. Adanson’s House Jumper
- Hasarius adansoni
- Males have more colorful bodies, with black abdomen color and two white crescents on their bodies. They grow up to 6mm (0.23 in).
- Females are dark brown and don’t have any noticeable pattern, and are about 8mm (0.31 in) long.
- Both sexes have long legs covered with spines and hairs.
The Adanson’s House Jumper lives in warm climates all over Guyana. Its natural habitats include woodland and low vegetation, but since they are highly adaptable, they can be found in any terrestrial area.
Although they can reuse their nests, they usually build new ones each night. Their webs are relatively small, about twice the size of the spider. The Adanson’s House Jumper is quite sociable and can be seen grouped in bigger numbers.
One of the most interesting traits of this species is its ability to jump incredible distances. They hunt by leaping several centimeters onto their prey, grabbing them, and injecting venom by bite.
#5. Pantropical Jumping Spider
- Plexippus paykulli
- Adult females range from 9-12 mm (0.35-0.47 in) long, while adult males range from 9-11 mm (0.35-0.43 in) long.
- Females are brownish gray and darker on their back and head, especially around the eyes, and have a broad tan stripe that extends onto the abdomen.
- Males are black with a broad white central stripe and two white spots near the rear of the abdomen.
Pantropical Jumping Spiders live near buildings or agricultural areas. They cleverly spend time around light sources that attract insect prey.
Unlike many spiders in Guyana, Pantropical Jumping Spiders do not construct a web. These incredible spiders have excellent eyesight and can take down prey twice their size. They feed on cockroaches, wasps, ants, and other insects. They stalk their prey and jump on it, relying on their brute strength to overpower it, injecting it with venom.
Although they look incredibly dangerous, Pantropical Jumping Spiders will only bite if handled roughly. Their bites are relatively harmless and may resemble a bee sting or be even milder.
#6. Pantropical Huntsman Spider
- Heteropoda venatoria
- Adults are 2.2-2.8 cm (0.86-1.1 in) long with a leg span of 7-12 cm (3-5 in).
- Females have larger bodies, and males have longer legs.
- Both sexes are brown with yellow or cream markings and distinct black spots on their legs.
The Pantropical Huntsman Spider is native to Asia but is a bit of a world traveler! They’re often called banana spiders because they hitch a ride in tropical fruit imports, making their way to other parts of the world. These fearsome-looking spiders thrive in areas with warm climates but are occasionally found in greenhouses and heated buildings in temperate climates.
Because of their need for warmth, Pantropical Huntsman Spiders slip into small cracks and crevices around homes, barns, and sheds. Luckily, they’re most active at night, so your chances of disturbing one are fairly low. Additionally, their venom is not dangerous to humans. However, they can deliver a painful bite that might swell and turn red.
As you may have guessed from their name, this species is an accomplished predator. Instead of trapping prey in webs, they rely on their speed and strength, grabbing prey with their jaws and injecting venom into it. In fact, people in many tropical countries like them because they feed on cockroaches and other pests.
#7. Amazon Thorn Spider
- Micrathena schreibersi
- They have a black body, yellow or white abdomen, and orange, reddish, or black legs.
- Their abdomen has black spikes, and two large black-tipped, orange spikes protrude from the rear.
- Males are smaller and have shorter spines.
This species has my vote for the best-looking spider in Guyana!
These fascinating spiders have long spikes and hardened abdomens, which help deter predators. In addition, although they aren’t venomous, they have bright coloring that makes them appear more dangerous, which is another adaptation to avoid being eaten!
Amazon Thorn Spiders in Guyana are most commonly found in tropical woodlands. They’re active during the day and retreat to the safety of their webs at night. Instead of actively hunting, this species waits in the safety of its web for prey to become trapped.
#8. Translucent Green Jumping Spiders
- Genus: Lyssomanes
- Females measure 7-8 mm (0.27-0.31 in) long, while males measure 5-6 mm (0.19-0.23 in).
- Most are pale, translucent green, with other characteristics ranging from bands on the legs, colorful fringe around the eyes, or spots on the body.
Translucent Green Jumping Spiders are often found in warm, humid forests. As their name suggests, this genus of spiders is often pale green with a nearly translucent exoskeleton. Although they look dangerous, most jumping spiders are harmless and good for pest control.
These common spiders in Guyana don’t construct webs. They have excellent vision and hunt their prey rather than waiting for it to get stuck in a web. They wait and ambush their prey, leaping on it when it gets close and then biting, immobilizing it. These accomplished hunters can take insect prey three times their size!
While Translucent Green Jumping Spiders have venom that can easily incapacitate their prey, their venom isn’t harmful to humans. They rarely bite and will only do so when roughly handled. Their bites typically only result in mild redness and irritation that subsides in a couple of days.
#9. Pinktoe Tarantula
- Avicularia avicularia
- Adult males reach about 9 cm (3.5 in) long, while females reach 13 cm (5.1 in).
- Adults are hairy and black or gray with reddish pink, violet, purple, or reddish-orange “toes.”
- Adult males are thinner with longer legs and have hooks on their first set of legs for grappling with females during courtship.
Look for these tree-dwelling spiders in Guyana in dense rainforests.
They’re nocturnal hunters and rely on their large size and strength to subdue prey rather than trapping it in a web. Their fangs fold down under their body, and they strike downward to impale and kill their prey.
Interestingly, when threatened, Pinktoe Tarantulas can throw urticating (skin-irritating) hairs as a form of defense. These hairs cause irritation and can become embedded in predators’ skin or eyes.
They’ll also bite, but only as a last resort. Despite their intimidating appearance, their venom is relatively mild. Their fangs leave puncture marks, and they may draw blood like a pinprick, but their venom causes a reaction similar to a wasp sting.
#10. Spinybacked Orb Weaver Spider
- Females are bright-colored and have a hard shell-like abdomen. They grow to 5-10 mm (0.2-0.4 in).
- Six spines stand out from their body.
- Males are much smaller and are not brightly colored. In addition, the spines are not as prominent.
- Also is known as Spiny-backed Orb-weaver, Spiny Orb-weaver, Thorn Spider, or Spiny Spider.
Many people don’t even realize these arachnids are spiders! Their hard body with spikes sticking out makes them incredibly unique for spiders that live in Guyana. Luckily, they aren’t dangerous to humans and will only bite out of self-defense.
Like most spiders, they make their webs at night. But here’s the interesting part, they have to make a new web EVERY day since they eat their web each morning.
Spinybacked Orb Weaver Spider webs are constructed a little differently than other spiders. They actually add little silk balls to the web so larger insects and birds don’t run into or destroy it. These act as a warning to larger insects and birds to save the spider the work of repairing holes made by larger animals.
Check out these other guides about animals found in Guyana!
Which of these spiders have you seen before in Guyana?
Leave a comment below!