Senin, 16 Desember 2013

Green Lynx Spider - (Peucetia viridans)





As its name might suggest, the Green Lynx Spider is a highly identifiable green spider of the Lynx spider grouping. Appearing an almost leaf-greenish shade, the species is further complimented by orange on the legs and black dots on a gray coloring as well. The abdomen contains chevron-looking shapes to further distinguish the species.

As with other species of spider, the female weighs in larger than the male at about 14mm to 16mm in size whereas the male comes in at just about 12mm to 14mm. Natural environments for the Green Lynx Spider includes open fields especially those exhibiting tall grassy surroundings to which the female will attach her egg sac to. Egg sacs are made of silk spun by the spider and the Green Lynx will also leave out a common "drag line" to which pull unsuspecting prey within its grasp.




Goldenrod Crab Spider - (Misumena vatia)








This species of spider uses camouflage as its primary defense, but will bite as well. They are able to change their coloration over the course of several days to blend in better with their surroundings.

They are an ambush spider, jumping on their prey. They do this instead of spinning webs.

Males are yellow with red bands or spots on their abdomen. Females are completely white or yellow, lacking bands or spots.


Feather Legged Spider - (Uloborus glomosus)





Thick legs with long, feathery hairs on them make this spider unique. They make look ferociou, but they lack venom glands.

It is a type of orb-weaver, creating fine webs that entangle prey. Typical orb-weavers recreate their web every day. A stabilimentum (zig-zag) may be visible in the web. They seem to hang, head-down, when collecting and feeding on prey.



Eastern Harvestman - (Leiobunum vittatum)








Harvestman are well camouflaged in their habitat and some species have the ability to spray a pungent scent from a gland between their first pairs of legs. Perhaps the most bewildering form of defense against a predator is self-amputation. A harvestman will remove one of its own legs (not one from the critical second pair, however) to distract a predator. The removed leg can twitch for up to an hour, allowing the harvestman time to escape. Sadly, the leg cannot grow back so it is a costly form of self-protection.


Desert Tarantula - (Aphonopelma chalcodes)






Desert Tarantulas are a common sight in the Southwestern states. They generally hide during the day, choosing instead to rest under rock collections or in protective holed burrows that are uninhabited in desert soil areas until dusk and night. As with most insect species, the male of the species is smaller though Desert Tarantulas in general are noted for their leg spans which can reach up to 4 inches on the females. Their bodies are also covered in noticeable hair. This spider will work hard at avoiding contact with people but will strike if disturbed or threatened. It should be noted that Desert Tarantula bites are considered to be poisonous and seeking medical assistance is advisable. In general, Desert Tarantula venom is reported to be about as dangerous as a bee sting but deadly allergic reactions may result.

Cross Spider - (Araneus diadematus)








The white cross marking on the abdomen of the Cross Spider became its name and main identifier. Originally from Europe, it was transported to North America and has settled in nicely given the similar climates of both continents. Unlike other non-native species, this exotic addition is not a pest. It is not harmful to humans either. It is a good worker in the garden and helps control real pests from destroying plants.

Like most members of the Orbweaver family, the Cross Spider sits in the center of its web with its head down. It may be spotted at times on the edge of its web or on a stem with its legs tucked under itself. If it feels threatened or in danger, it may first use its legs to violently shake and shimmy its web to startle the threat in hopes of causing it to leave. If that does not happen, the spider will drop to the ground and return to its web's center when it feels safe again. This spider creates a new web every day.

The Cross Spider female is almost twice the size of the male. There is evidence that some females eat the male after mating. Females lay eggs in a sac that is usually hung from the web. Their life span is only 12 months long.

This spider can be found in a variety of habitats. They are comfortable and successful in woodlands, savannas, meadows, gardens, grasslands, semi-arid regions and evergreen forests.

Cribellate Orb Weaver - (Uloborus spp.)







The legs of this spider are hairy and the foremost pair are quite long. They create webs to catch prey, but do not have sticky silk. Instead, small prey get tangled in the fine threads in such a way that stickiness is not necessary. The cribellum on the legs allow the spider to 'comb' its web, keeping the fine strands separated until prey enters.

Webs are built parallel to the ground. The spider sits on or near it in a 'tucked' position, giving it the appearance of a dead flower or piece of leaf.