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Jorō (Nephila clavata)

Belonging to the genus of garden orb weavers, the life cycle of Jorō spider usually last from one winter to the next winter. The attractive features of female spiders let it stand apart from others in the genus.

Scientific Classification

Joro Spider

Physical Description and Identification

Adults

Size: Female spiders are 0.66-0.98 in (1.6-2.4 cm) and males are 0.27-0.39 in (0.68-0.99)

Females might have leg spans measuring 3-4 in (7.62-10.16 cm)

Color: Female spiders have deep blue and yellow bands on their legs and the abdomen is an infusion of red, yellow, and black in beautiful asymmetrical patterns. Males are not that attractive as they have a brown body.

Other Characteristic Features: Both males and females have an elongated abdomen.

Joro Spider Size

Eggs

Females make an egg sac on a silken base and lay around 400-1500 eggs in that. The sac is then covered with a bright yellow silk. Mostly the entire thing is attached to brunches or any human construction. Followed by overwintering, the eggs hatch in the spring.

Spiderlings

Followed by overwintering, the eggs hatch in the spring and spiderlings then scatter away.

The Web

Female Jorō spiders create big webs, similar to a basket in shape. Unlike other orb spider webs, the 3 layered web has 1 central orb accompanied by 2 asymmetrical layers, both at the front and backside of the orb.

Joro Spider Web

Are Jorō Spiders Venomous

As far as recent studies concerned, the spider is not detrimental for humans. One bite from the spider might cause redness and blisters on the skin with a little bit of pain. The affected area is usually healed within one day if the person concerned doesn’t have any allergic reaction otherwise.

Quick Facts

Other Names Jorou spider, joro-gumo(Japanese) and  Mudang spider(Korea)
Distribution North America (Northeast Georgia), China, Korea, Taiwan, and Japan
Habitat Forests and human habitations
Diet Insects
Web Type Orb web
Lifespan Around 1 year
IUCN Conservation Status Least Concern

Did You Know

  • Closely associated with Japanese mythology, the spider is described as “whore spider” and “entangling or binding bride”. This is because according to the folklore, the spider can change its shape and transform into a seductive woman to allure men first and subsequently devour them. According to Korean belief, the spider is known as “shaman” or “fortune teller”.

Image Credits: Thenatureniche.files.wordpress.com, S3-eu-west-2.amazonaws.com, Thumbs-prod.si-cdn.com

Belonging to the genus of garden orb weavers, the life cycle of Jorō spider usually last from one winter to the next winter. The attractive features of female spiders let it stand apart from others in the genus.

Joro Spider

Physical Description and Identification

Adults

Size: Female spiders are 0.66-0.98 in (1.6-2.4 cm) and males are 0.27-0.39 in (0.68-0.99)

Females might have leg spans measuring 3-4 in (7.62-10.16 cm)

Color: Female spiders have deep blue and yellow bands on their legs and the abdomen is an infusion of red, yellow, and black in beautiful asymmetrical patterns. Males are not that attractive as they have a brown body.

Other Characteristic Features: Both males and females have an elongated abdomen.

Joro Spider Size

Eggs

Females make an egg sac on a silken base and lay around 400-1500 eggs in that. The sac is then covered with a bright yellow silk. Mostly the entire thing is attached to brunches or any human construction. Followed by overwintering, the eggs hatch in the spring.

Spiderlings

Followed by overwintering, the eggs hatch in the spring and spiderlings then scatter away.

The Web

Female Jorō spiders create big webs, similar to a basket in shape. Unlike other orb spider webs, the 3 layered web has 1 central orb accompanied by 2 asymmetrical layers, both at the front and backside of the orb.

Joro Spider Web

Are Jorō Spiders Venomous

As far as recent studies concerned, the spider is not detrimental for humans. One bite from the spider might cause redness and blisters on the skin with a little bit of pain. The affected area is usually healed within one day if the person concerned doesn’t have any allergic reaction otherwise.

Quick Facts

Other Names Jorou spider, joro-gumo(Japanese) and  Mudang spider(Korea)
Distribution North America (Northeast Georgia), China, Korea, Taiwan, and Japan
Habitat Forests and human habitations
Diet Insects
Web Type Orb web
Lifespan Around 1 year
IUCN Conservation Status Least Concern

Did You Know

  • Closely associated with Japanese mythology, the spider is described as “whore spider” and “entangling or binding bride”. This is because according to the folklore, the spider can change its shape and transform into a seductive woman to allure men first and subsequently devour them. According to Korean belief, the spider is known as “shaman” or “fortune teller”.

Image Credits: Thenatureniche.files.wordpress.com, S3-eu-west-2.amazonaws.com, Thumbs-prod.si-cdn.com

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