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The zebra spider (Salticus scenicus) is a common jumping spider of the Northern Hemisphere.Their common name refers to their vivid black-and-white colouration, [1] whilst their scientific name derives from Salticus from the Latin for “jump”, and the Greek scenicus, translating to “theatrical” or “of a decorative place,” in reference to the flashy, zebra-like coloration of the species.
The main pair of eyes in jumping spiders even sees in color. [9] Net-casting spiders of genus Deinopis have their posterior median eyes enlarged into large forward-facing compound lenses. These eyes have a wide field of view and are able to gather available light more efficiently than the eyes of cats and owls.
Basic arrangement of spider eyes, viewed from above. Most spiders have eight eyes, which tend to be arranged into two rows of four eyes on the head region. The eyes can be categorised by their location and are divided into the anterior median eyes (AME), anterior lateral eyes (ALE), posterior median eyes (PME), and posterior lateral eyes (PLE).
On the other hand, experts do worry about spider bites about bites from venomous spiders, particularly black widows and brown recluse spiders. A bite from one of these types of spiders can cause ...
These types of bites are rare, but brown recluse, black widow, and hobo spider bites can be deadly, so if you suspect one bit you, seek medical treatment immediately. You may need antibiotics ...
The basal portion includes all or part of the spider's venom glands, which can be squeezed to control the amount of venom forced out of the glands. [2] Such control permits a spider to administer either a dry bite, a dose appropriate to the nature of the prey or enemy, or a maximal dose. [2]
A venomous spider bite (like this brown recluse bite) can cause a red or purplish rash radiating from the site of the bite. There are only a few species of spiders in the U.S. that can bite humans.
Spider behavior refers to the range of behaviors and activities performed by spiders. Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom . They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms [ 1 ] which is reflected in their ...