While the giant lichen orb weaver may not be the largest orb weaver in terms of diameter, thanks to its massive abdomen, it is one of the heaviest orb weaver spiders. Like most other orb weavers, Araneus bicentenarius is a nocturnal spider and spins large webs.
Quick Overview: Araneus bicentenarius – Giant Lichen Orb Weaver
Medically significant: No
Maximum body size: 1 inch (2.4 cm)
Main colors: gray, orange, black, greenish, white
Range: Eastern and Central United States and Canada
Web: Large orb-shaped web – up to 8 feet (2.5 meters) in diameter
Giant lichen orb weaver description
Most commonly, the legs of the giant lichen orb weaver are orange colored with black rings. The body is usually a grayish green with dark and white markings on it. Sometimes, the colors may also be close to yellow or a very gray green.
Thanks to its intricate markings on the back of the abdomen, the giant lichen orb weaver is often confused with the European garden spider (Araneus diadematus) which also occurs in the U.S. If you can get a close look, you can distinguish the two because the giant lichen orb weaver doesn’t have cross-shaped markings on its back.
Size
Giant lichen orb weavers reach a size of around one inch (2.4 cm).
Web
The giant orb weaver spins huge webs of a size up to 8 feet in diameter. Unlike most other orb weavers, Araneus bicentenarius usually spends most of its time on the edges of the web, not in the center. To stay safe from bird predators, orb weaver are mostly active at night and hide throughout the day.
Bite
For humans, the bite of a giant lichen orb weaver is generally not dangerous. At worst, you may experience symptoms comparable to a bee sting. Since the species is active at night, bites rarely occur.
Araneus bicentenarius scientific classification
- Kingdom: Animalia
- Phylum: Arthropoda
- Subphylum: Chelicerata
- Class: Arachnida
- Order: Araneae
- Infraorder: Araneomorphae
- Family: Aranidae
- Genus: Araneus
- Species: Araneus bicentenarius
Distribution of the giant lichen orb weaver in the USA
The giant lichen orb weaver is most commonly found in the Eastern States and in the Mid-Western States of the U.S. Hence, Araneus bicentenarius occurs in the following states: Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Vermont, Virginia, West Virginia and Wisconsin.
Are these ever found in Oregon?
You might find them in Oregon but generally, their population is more on the East Coast. If you see a similar spider on the West Coast, you might be dealing with a spotted orb weaver (http://usaspiders.com/neoscona-crucifera-spotted-orb-weaver/) r another relative of the Araneus family. None of the orb weaver spiders are medically significant and great for pest control.
Does this spider do a angry dance when you get too close to its web? My husband and I took a picture of it and afterwards the spider seemed to “dance” to try intimidate us.
Yes, that might happen. Often, orb weavers start “jumping” on their webs to make it move and give the impression of a large threat to whatever is approaching them.
We just had to kill one of these with poisonous insect spray because it built a giant web in our outdoor door frame (we have small children). When we sprayed it it started to do what looked like a weird dance where he put his bottom up in the air and then did like a michael jackson toe stand. We are in Birmingham, Alabama and see these spiders quite frequently.
Hi Julie, these spiders are not dangerous for pets or children. Next time, you could just use a glass jar or a stick to remove it from the area where it is not supposed to be.
The poisonous insect spray is way more harmful to your children (and you) than the spider is.
In Michigan does the same spider come out in Spring or does it die in winter? {Giant Orb-Weaver}
Generally, orb-weavers die in winter. They spend the last weeks of autumn to lay eggs and lose a lot of energy during this time. Once the colder tempertures hit, adults will mostly not make it. The next generation overwinters outside in their egg sacs and will hatch during spring and be ready to reproduct next autumn.
We had a lovely female last summer who built a web from a low hanging branch all the way to the ground! I first came across her as I was mowing the lawn. It was just before sunset, so I very nearly walked straight into her web. I am grateful that I didn’t, as I am still a bit squeamish around large spiders and would feel bad ruining all of her hard work. I like admiring spiders from a distance though, and enjoyed checking on her each night (and sometimes during the day to see her tucked away in her leaf shelter) until the season came to an end. I hope that she was successful in reproducing. You can see her here: https://www.inaturalist.org/observations/57362605