The pointed spikes on the female’s abdomen are believed to make her less appealing to predators, hurting the predator when they try and bite the spider. The spined Micrathena (Micrathena gracilis) is a type of orb weaver, except it has thorn-like spikes on its abdomen, which is not a common trait of this species. Spined Micrathena Adult female spined micrathena Their vision is very poor and they are only able to see up to four inches away. They are not aggressive towards humans, but they will bite in self-defense. It is not uncommon for males and females to share a web for an extended period and for females to have their webs close to each other, even though the females are likely to fight when they come into contact with each other. The female has a bulb-shaped abdomen, with male abdomens being less bulb-like. Females can grow to 0.24 inches (6mm) with males being on the smaller side, growing to 0.19 inches (4.7mm). They are various shades of tan to black with patterns on the body. They spin their webs and then rely on o the vibrations to identify when prey is entangled, which is usually household insects and other pests. The common house spider (Parasteatoda tepidariorum) is also known as the American house spider, living in and close to human homes. They seldom bite but will bite if they are squeezed and feel threatened. They prefer vertical surfaces, such as walls and fences. Their abdomens have a prominent pattern on a mottled surface with females growing to 13mm in body length and the male being slightly smaller at around 9.5mm. Tan jumping spiders (Platycryptus undatus) have compressed bodies, which enables them to hide under the bark of trees. They are not seen during the day, as they are nocturnal, waiting for prey to get entangled in their webs. They prefer fields, gardens, parks, backyards, and woodland and are mostly active from May to August. Some have a visible pattern on their abdomen and dark zigzag lines down the sides. Their colors can range from tan to orange/red and yellow/brown. During the day they hide on the edge of the web. They can create orb-shaped webs up to two feet in diameter. Spotted orbweavers (Neoscona crucifera) are hairy with red legs. These spiders rebuild their webs at night. If the spider feels threatened, they drop from the web, hiding on the ground. They build a circular shape web that can be up to two feet in diameter with zigzag silk and the spider hanging in the middle. Their webs are usually spun close to sunny fields, where the spider is protected from the wind. They will bite if you disturb or provoke them, though their bites are not considered dangerous and will give a nasty sting, which will clear up on its own at home. Males are smaller than the females with males growing to 0.35 inches (9mm) in body length and females to 1.10 inches (28mm) in body length. Their cephalothorax (head space) is white with yellow and black on the badmen. Yellow garden spiders (Argiope aurantia) are black and yellow spiders that were first described in 1833. Yellow Garden Spider Yellow garden spider The rear of the abdomen has red to orange spots 3. This spider has dark green to orange legs and sides with a spotted underside in yellow and black and a silver back with brown and black streaks. The orchard orb weaver (Leucauge venusta) spins a horizontal web where the spider hangs upside down in the center. Orchard Orbweaver Adult female orchard orbweaver Their webs are their private retreat, a place to hide and feel safe, consume prey and lay eggs. They do not spin webs to capture prey but are wandering predators that ambush their prey. The bold jumping spider is happy to live anywhere from inside your home or office to inside your car. They have hair on their legs and pedipalps. These small spiders have strong colors, they are black with a white line that runs across the abdomen and two white dots close to the back. Don’t be fooled they will bite, though it is no worse than a bee sting and their bites are not considered medically significant. Bold Jumping Spider Female bold jumping spiderīold jumping spiders (Phidippus audax) are small and hairy jumping spiders belonging to the Salticidae family with the ability to jump more than four times its body length, which they use to ambush prey.īites are rare, as they are difficult to catch.
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