Angulate And Roundshouldered Orbweavers

araneus

The angulate and roundshouldered orbweavers of the genus Araneus are remarkable arachnids famous for building classic, geometrically perfect spiral webs. Found globally, these spiders are essential pest controllers in forest and garden ecosystems. Their common names derive from the distinctive humps or 'shoulders' on the upper margins of their large abdomens. Primarily active at twilight and night, they showcase incredible engineering skills, spinning strong silk structures to capture flying insects. Many species within this genus consume their web daily to recycle the proteins before building a new one.

Habitat: Typically found in temperate forests, woodlands, gardens, and shrublands, often constructing webs between tree branches or near outdoor light fixtures.

Appearance

These medium to large spiders are characterized by a bulbous, triangular abdomen with prominent shoulder humps. Their coloration is highly variable, ranging from mottled greys, browns, and tans to striking yellows and oranges, providing excellent camouflage against tree bark. Many species display a leaf-like pattern called a folium on their back. Their legs are long, robust, and heavily spined, often banded with alternating dark and light rings to disrupt their outline. Females are much larger than males, with body lengths typically between 1 and 3 centimeters.

KingdomAnimaliaPhylumArthropodaClassArachnidaOrderAraneaeFamilyAraneidae

Angulate And Roundshouldered Orbweavers

Interesting facts

Spider silk from this genus is exceptionally strong, possessing a tensile strength comparable to high-grade steel of the same thickness.

The shoulder humps on angulate orbweavers help disguise them as tree bark nodules or seed pods when they tuck their legs in.

They often eat and rebuild their webs daily, a process that takes only about 30 to 45 minutes of intensive work.

Special abilities

They construct highly organized vertical spiral webs using both non-sticky structural silk and sticky capture silk, optimized to trap flying insects.

They systematically consume their old webs daily, digesting the silk proteins to quickly produce fresh webbing with minimal waste.

They rely on highly sensitive slit sensilla on their legs to detect minute vibrations traveling through the web, allowing them to pinpoint prey instantly.

Measurements & details

Length: 1-3 cm
Weight: 0.0001-0.005 kg
Lifespan: 1-2 years
Clutch Size: 100-800
Incubation: 14-30 days

Diet & Feeding

They primarily feed on insects that fly into their spiral webs, which they wrap in silk and paralyze with venom.

Primary Foods

Flies
Moths
Wasps
Mosquitoes

Foraging Method

Ambush

Ecological connections

eaten by

Blue Jay

Cyanocitta cristata

Predator that frequently plucks orbweavers directly from their webs.

eaten by

Black-and-Yellow Mud Dauber

Sceliphron caementarium

A wasp that paralyzes orbweavers to provision its mud nests for its larvae.

hunts

House Fly

Musca domestica

Common flying insect pest captured and consumed by the spider.

Traits

Solitary

Solitary animals live alone for most of their lives, only interacting with others for mating or parental care.

Aerial

Aerial creatures spend a significant portion of their lives airborne, utilizing flight for various activities such as hunting, migration, or nesting.

Web Builder

This trait characterizes organisms that construct elaborate silken webs for catching prey, shelter, or reproduction.

Colorful

Colorful describes organisms or objects displaying a wide range of bright and distinct colors.

Insectivorous

This trait identifies organisms whose diet primarily consists of insects and other small invertebrates.

Forest

Forest habitats are terrestrial environments dominated by dense tree cover, supporting a high diversity of plant and animal life.

Carnivorous

This trait identifies organisms whose diet consists entirely or primarily of animal tissue.

Also known as

Orbweaver

Collections

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Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Angulate And Roundshouldered Orbweavers?

The easiest way to identify Angulate And Roundshouldered Orbweavers is to use the Snappit nature identifier app.

How long is Angulate And Roundshouldered Orbweavers?

1-3 cm

How much does Angulate And Roundshouldered Orbweavers weigh?

0.0001-0.005 kg

How long does Angulate And Roundshouldered Orbweavers live?

1-2 years

What does Angulate And Roundshouldered Orbweavers eat?

They primarily feed on insects that fly into their spiral webs, which they wrap in silk and paralyze with venom.

Where is Angulate And Roundshouldered Orbweavers usually found?

Typically found in temperate forests, woodlands, gardens, and shrublands, often constructing webs between tree branches or near outdoor light fixtures.

How does Angulate And Roundshouldered Orbweavers hunt?

Ambush

How many eggs does Angulate And Roundshouldered Orbweavers lay?

100-800