Spiders are
one of the smallest but most lethal creatures. Fear of spiders in some
people it is quite reasonable because the spider venom can kill several
people or animals at once.
1.Brown Recluse
The brown recluse spider or violin
spider, Loxosceles reclusa, is a well-known member of the family
Sicariidae. Brown recluse spiders are usually between 6–20 mm, but may
grow larger. They may be brown or gray and usually have markings on the
dorsal side of their cephalothorax, with a black line coming from it
that looks like a violin with the neck of the violin pointing to the
rear of the spider, resulting in the nicknames fiddleback spider, brown
fiddler or violin spider.
2.Black Widow
Black Widow is a common name of some
spiders in the genus Latrodectus – see Black widow spider for a specific
list of such spiders.
3.Brazilian Wandering Spider
The Brazilian wandering spiders, armed
spiders or banana spiders are a genus of aggressive and highly venomous
spiders found in tropical South and Central America. These spiders are
members of the Ctenidae family of wandering spiders.
4.Funnel-Web Spiders
The araneomorph funnel-web spiders of
the family Agelenidae include the common grass spiders of the genus
Agelenopsis, as well as the purportedly venomous European hobo spider,
Tegenaria agrestis, which has been introduced into the Pacific Northwest
of the United States. Note: The araneomorph funnel-web spider should
not to be confused with the funnel-web tarantula and the venomous
funnel-web tarantula, both of which are members of the suborder
Mygalomorphae. The venomous funnel-web tarantulas include the infamous
Sydney funnel-web spider.
5.Mouse Spiders
Mouse spiders are spiders of the genus
Missulena, in the mygalomorph family Actinopodidae. There are 11 known
species in this genus, all but one of which are indigenous to Australia.
One species, M. tussulena, is found in Chile. The name derives from an
old belief, now known to be false, that the spiders dig deep burrows
similar to those of mice. There is evidence that the bite of a mouse
spider is potentially as serious as that of an Australasian funnel-web
spider; however recorded envenomings by this spider are rare. Funnel-web
antivenom has been found to be an effective treatment for serious
bites.
6.Red Back Spider
The Redback spider is a potentially
dangerous spider native to Australia that resembles a Black widow
spider. It is a member of the genus Latrodectus or the widow family of
spiders, which are found throughout the world. The female is easily
recognisable by its black body with prominent red stripe on the upper
side of its abdomen. Females have a body length of about a centimetre
while the male is smaller, being only 3 to 4 millimetres long. The
Redback spider is one of few arachnids which display sexual cannibalism
while mating.
7.Wolf Spider
Wolf spiders are members of the family
Lycosidae, from the Greek word meaning “wolf”. They are robust and
agile hunters with good eyesight. They live mostly solitary lives and
hunt alone. Some are opportunistic wanderer hunters, pouncing upon prey
as they find it or chasing it over short distances. Others lie in wait
for passing prey, often from or near the mouth of a burrow. Wolf spiders
resemble Nursery web spiders, but they carry their egg sacs by
attaching them to their spinnerets. Wolf spiders have two eyes out of
eight that are large and prominent. The eight eyes of the Nursery web
spiders are all of approximately equal size.
8.Goliath Birdeater Tarantula
The Goliath Bird-eater Spider is an
arachnid belonging to the tarantula group, Theraphosidae, and is
considered to be the second largest spider in the world. The spider
was named by explorers from the Victorian era, who witnessed one eating a
hummingbird.
9.Sac Spider
The sac spiders of the family
Clubionidae have a very confusing taxonomic history. Once this family
was a large catch-all taxon for a large group of disparate collection of
spiders, similar only in that they had eight legs arranged in two rows,
conical anterior spinnerets that touched and were wandering predators
that built silken retreats, or sacs, usually on plant terminals, between
leaves, under bark or under rocks. These are now recognized to include
several families, some of which are more closely related to the
three-clawed spiders, like lynx and wolf spiders, than to true
“clubionoids.
10.Hobo Spider
The hobo spider is a member of the
genus of spiders known colloquially as funnel web spiders. It is one of a
small number of spiders in North America whose bites are generally
considered to be medically significant. Individuals construct a
funnel-shaped structure of silk sheeting and lie in wait at the small
end of the funnel for prey insects to blunder onto their webs. Hobo
spiders sometimes build their webs in or around human habitations.
Although this species of spider has a reputation for aggressiveness,
they will normally avoid contact with humans. Most bites occur when the
spider is accidentally crushed or squeezed by a human. The spider’s
venom is strong enough to cause considerable local pain and possibly
necrosis.
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