Spiders, Are they scare you? Or do you scare them? Actually It doesn't matter because Some spiders scare you and you scared some spider. The only difference is The venomous and power of it. Here we are going to share top 5 most venomous spiders in the word that often scared us if not kill! Yeah, These spiders can easily kill human and domestic animals by injection venom to animal body.

5. 5

6. Identification
Redback spiders (Latrodectus hasselti) belong to the Family
Theridiidae,which is found worldwide.The notorious Black Widow Spider
(Latrodectus sp) of the United States is a close relative of the Redback
Spider, and only differs in appearance by the absence of a red dorsal
stripe. Other species of Latrodectus occur in Africa, New Zealand
(the Katipo), the Pacific Islands, Europe and North and South America.
Female Redback Spiders are black (occasionally brownish) with an
obvious orange to red longitudinal stripe on the upper abdomen,
with the red stripe sometimes being broken, and an "hourglass"
shaped red/orange spot on the underside of the abdomen. Juveniles
have additional white markings on the abdomen. Females have a body
about the size of a large pea and slender legs.
The males' red markings are often less distinct. The body is light brown
with white markings on the upper side of the abdomen, and a pale
hour-glass marking on the underside.

7. Size range
*Female : 3 mm (0.3 cm)
* Male : 4 mm (0.4 cm)

8. Similar Species
Grey House Spider,
Cupboard Spider

9. Classification
Species : hasselti
Genus : Latrodectus
Family : Theridiidae
Order : Araneae
Class : Arachnida
Phylum : Arthropoda
Kingdom : Animalia
Redback Spider

10. 4

11. Male Funnel-web Spider

12. Identifying Funnel-web Spiders
* Shiny carapace
* Deeply curved groove (fovea)
* No obvious body pattern
* Eyes closely grouped
* Four spinnerets, largest with last segment longer than wide
* Lower lip (labium) studded with short, blunt spines
* Modified male second leg (usually with a mating spur or grouped
spines)
* An obvious, conical projection or 'spur' on the lower side of the
middle segment (tibia) of the second leg (about halfway along) is
characteristic of the genus Atrax, exemplified by the Sydney
Funnel-web Spider, Atrax robustus. Males of all other funnel-web
species (currently placed in the genus Hadronyche) either have a
blunt, spine-covered tibial swelling, or a few spines only, on the
second leg. Note also the mating organ on the male palp.

13. Suspects gallery
These spiders are funnel-webs:
* Sydney Funnel-web Spider (Atrax robustus) male
* Southern Tree Funnel-web Spider (Hadronyche cerberea)
These spiders are sometimes mistaken for
funnel-webs:
* Sydney Brown Trapdoor Spider (Misgolas rapax) male
* Sydney Brown Trapdoor Spider (Misgolas rapax) female
* Mouse Spider (Missulena sp) female
* Bymaniella near Guyra, New South Wales
* Black house spider (Badumna insignis)

14. 198 potential funnel-web spider bites were identified: 138 were definite
(spider expertly identified to species or genus), and 77 produced severe
envenoming. All species-identified severe cases were attributed to one
of six species restricted to NSW and southern Queensland. Rates of
severe envenoming were: Hadronyche cerberea (75%), H. formidabilis
(63%), Atrax robustus (17%), Hadronyche sp. 14 (17%), H. infensa (14%)
and H. versuta (11%). Antivenom was used in 75 patients, including 22
children (median dose, 3 ampoules; range, 1–17), with a complete
response in 97% of expertly identified cases. Three adverse reactions
were reported, all in adults: two early allergic reactions (one mild and
one with severe systemic effects requiring adrenaline), and one case of
serum sickness.
Funnel-webspiderbite

15. Funnel-web spider Venom
Average Venom Qty
0.14 mg ( dry weight ), Sutherland and Tibballs (2001)
( Ref : R001112 ).
* General : Venom Neurotoxins (Excitatory neurotoxins)
* General : Venom Myotoxins (Not present )
* General : Venom Procoagulants (Not present)
* General : Venom Anticoagulants (Not present)
* General : Venom Haemorrhagins (Not present)
* General : Venom Nephrotoxins (Not present)
*General : Venom Cardiotoxins (Secondary cardiotoxicity
only)
* General : Venom Necrotoxins (Not present)
* General : Venom Other (Not present or not significant)

16. Clinical Effects
* General : Dangerousness (Severe envenoming possible, potentially
lethal)
* General : Rate of Envenoming: 10-20%
* General : Untreated Lethality Rate (Most cases minor, but in severe
cases, high lethality rate if untreated.)
* General : Local Effects (Local pain only)
* General : Local Necrosis (Does not occur, based on current clinical
Evidence)
* General : General Systemic Effects (Headache, nausea, vomiting,
abdominal pain, coma, rarely convulsions.)
* General : Myotoxicity (Does not occur, based on current clinical
evidence)
* General : Coagulopathy & Haemorrhages (Does not occur, based on
current clinical evidence)
* General : Renal Damage (Does not occur, based on current clinical
Evidence)
* General : Cardiotoxicity (Rare, usually secondary)
* General : Other (Does not occur, based on current clinical evidence)

17. Treatment
Treatment Summary
Funnel web spider bites, though mostly minor, can cause severe, even
fatal envenoming rapidly, so all cases should be managed as a medical
emergency. At the first sign of systemic envenoming, IV CSL Funnel Web
Spider Antivenom should be given, 2-4 vials initially, depending on
severity, followed by further doses if envenoming persists or recurs.
Key Diagnostic Features
Painful bite, rapid development of systemic envenoming, with perioral
tingling, tongue fasciculation, headache, nausea, increased sweating,
salivation, lachrymation, piloerection, hypertension, pulmonary oedema.
General Approach to Management
All cases should be treated as urgent & potentially lethal. Rapid
assessment & commencement of treatment including appropriate
antivenom (if indicated & available) is mandatory. Admit all cases.
Antivenom Therapy
Antivenom is the key treatment for systemic envenoming. Multiple
doses may be required.

18. Taxonomy
and
Biology
* Suborder:
Mygalomorphae
* Family:
Hexathelidae
* Genus:
Atrax
* Species:
robustus
•Common Names :
Sydney Funnel Web
•Spider
* Region :
Australia
* Countries :
Australia

19. 3BlackWidowSpider

20. Description/Identification
*Female black widow spiders are about .5 inch long, to about 1.5
inches long when the legs are spread.
*Males are about half the female's size, with smaller bodies and
longer legs.
*Both females and males have shiny, globular abdomens and are
mostly black, and sometimes brown.
*Females usually have a reddish hourglass shape on the underside
of their abdomens. In some species the females have a series of
red spots and two crosswise bars on the underbelly.
*Male black widows frequently have yellow and red bands and
spots over their backs, as do both sexes of black widows in their
immature stages.
*Newly hatched spiderlings are predominately white or
yellowish-white, gradually acquiring more black and varying
amounts of red and white with each molt.
*Juveniles of both sexes resemble the male and are harmless to
humans.

23. Geography – Range
Black widow spiders inhabit most of the
warmer regions of the world to a latitude
of about 45 degrees N and S. They occur
throughout all four deserts of the
American Southwest.

24. Comparisons
The brown widow spider (Latrodectus geometricus) is not as
dangerous as some other widow spiders because the brown
widow spider is less likely to bite someone, and injects less
poison. Still, it is a venomous creature, and must be treated
with respect. It is found throughout the world's tropical
regions, and has been introduced into southern Texas, central
and southern Florida, and has now also been found in
southern California.
Hundreds of Australians are bitten every year by the red-back
spider (Latrodectus hasselti), a close relative of the black
widow spider. The red-back is found in all parts of Australia
except in the hottest deserts and on the coldest mountains.

25. Food & Hunting
Like most arachnids, the black widow preys on insects. Prey
caught in the web include a variety of insects (cockroaches and
beetles) and other arthropods. After ensnaring its prey in the
web, the black widow makes small punctures in the victim's
body and sucks out the liquid contents. The black widow is
preyed upon by mud-dauber wasps.

26. What a Bite Looks and Feels Like
A person who gets bitten by a black widow spider might not know it
right away, since the bite can sometimes feel like a little pinprick.
After 30 to 40 minutes, though, the area of the bite will swell and hurt
a lot, and sometimes a person can get achy all over.
Other symptoms can include weakness, nausea, vomiting, sweating,
and headache.

28. What You Should Do
If you ever think that you've been bitten by a black widow spider,
tell an adult immediately. Black widow spider bites rarely kill people,
but it's important to get medical attention as soon as you can because
they can make you very sick.
With an adult's help, wash the bite well with soap and water. Then
apply an ice pack to the bite, and try to elevate the area and keep it
still to help prevent the spread of venom (poison).
If it's possible, have an adult catch and bring the spider to the doctor's
office with you. Even though it's usually easy to identify black widows,
you'll want to make sure that's the kind of spider that bit you. The
spider can be killed first before you bring it with you; just be sure not
to squish it so much that no one can tell what it is.

29. Classification
Black Widow
Spiders
* Genus: Latrodectus
* Phylum: Arthropoda
* Sub Phylum: Chelicerata
* Class: Arachnida
* Order: Araneae
* Sub Order: Labidognatha
* Family: Theridiidae
* Species: 6
* Weight: 1 gram.
* Length: 1-1.5"
* Span: 1-3"
* Sexual Maturity: 70-90
days.
* Mating Season: Spring
* Incubation: 14-30 days
* No. of Eggs: 250-700/sac
* Birth Interval: 4 to 9 egg
sacs/summer
* Lifespan: up to 3 years
* Typical Diet: insects

30. 2Brown Recluse Spider

31. Identification
* Brown recluse spiders have 6 eyes arranged in pairs with a space
separating the pairs .Most spiders have 8 eyes in two rows of four.
Seeing this feature clearly requires a good quality hand lens.
* Brown recluse spiders have a dark violin shape on the cephalothorax
(the portion of the body to which the legs attach). The neck of the
violin Points backward toward the abdomen.
* Brown recluse spiders have uniformly light-colored legs – no stripes,
no bands.
* Brown recluse spiders have a uniformly-colored abdomen which can
Vary from cream to dark brown depending on what it has eaten;
however, it will never have two colors of pigment at the same time.

32. Identification
•Brown recluse spiders do not have spines on the legs, only fine hairs.
* Brown recluse spiders make small retreat webs behind objects, never
out in the open.
* Brown recluse spiders bodies are less than half an inch (actual body
Length is 3/8 of an inch).That means the body without legs is less than
the length of a dime.

34. Geography – Range
The brown recluse spider is most common in the south and
central states of the United States, especially in Missouri,
Kansas, Arkansas, Louisiana, eastern Texas, and Oklahoma.
However, the spider has been found in several large cities
outside this range.
The brown recluse spider prefers dark, sheltered areas such
as under porches and in woodpiles.

36. Brown recluse spiders like undisturbed places for their webs. They
hunt primarily at night and will take refuge during the daytime in
clothing and bedding, and are often found in unused closets and
storerooms, behind furniture, and in baseboard cracks and crevices.
Outside, they can be found in foundation cracks, cracks in the soil, and
window wells. The brown recluse spider prefers food such as firebrats,
crickets, cockroaches and other soft bodied creatures. Earning their
name well, the brown recluse spider ceases its wanderings at first light.
The brown recluse spider is a non-aggressive spider and will only bite
when disturbed. Usually, the brown recluse spider bite is not felt at the
time of occurrence, and pain sets in from six to eight hours later. A
typical bite area may resemble a pimple, pustule or blister formation
from six to 12 hours later. The bites are unpleasant, producing an
ulcerous wound called a necrotic lesion that turns dark within a day
and takes a long time to heal. See Symptoms of Brown Recluse Spider
bite and information on how to treat the bite.
Brown Recluse Spiders Behavior

37. Brown Recluse Spider Biology
Brown recluse spiders measure 6 to 11 mm in body length and are
golden brown in color with long, thin legs. Their bodies are covered in
fine, dark hair. Brown recluse spiders are most easily identified by a
characteristic fiddle or violin pattern near the head region and six eyes
arranged in pairs. Both characteristics must be seen to positively
identify it as a recluse. Brown recluse spiders are also known as violin
or fiddle-back spiders as a result of these markings. The fiddle shape is
light to dark brown in color.
One female brown recluse spider may produce up to five egg sacs with
as many as 300 eggs in each sac. Within 25 to 39 days, newly hatched
spiders will emerge.

38. Young brown recluse spiders are slow to grow and may reach maturity
within 10 to 12 months. Their development is influenced by factors such
as food and weather conditions. However, brown recluse specimens are
capable of surviving for extended periods without food or water.
These spiders are nocturnal, emerging at night to hunt for small prey.
The webs of brown recluses are small, loose and irregular. Unlike some
spider species, they do not use their webs to trap prey.
Brown Recluse Spider Biology

39. What a Bite Looks and Feels Like
A person who gets bitten by a brown recluse spider may
not notice anything at first or only feel a little sting at first.
After about 4 to 8 hours, the sting will start to hurt a little
more. It might look like a bruise or might form a blister
surrounded by a bluish-purple area that turns black or
brown and becomes crusty after a few days.

40. What You Should Do
If you ever think that you've been bitten by a brown recluse
spider, tell an adult immediately. Brown recluse spider bites
rarely kill people, but it's important to get medical attention as
soon as you can because they can make you pretty sick. With an
adult's help, wash the bite well with soap and water. You can also
apply ice to the area, elevate it, and keep it still.
If it's possible, have an adult catch and bring the spider to the
doctor's office with you — this is important because it can
sometimes be hard to diagnose a spider bite correctly. The spider
can be killed first before you bring it with you; just be sure not to
squish it so much that no one can tell what it is.

41. How to Avoid Getting Bitten
The best way to avoid getting bitten by brown recluse spiders is to be
careful in areas where they like to spend time. Don't play around in
rock piles or woodpiles. If you are working outside in the yard in big
piles of logs or leaves, wear gloves.
Be sure to shake out blankets and clothing that have been stored in
the attic or the basement, or if they have been in a closet but not used
for a long time.
If you keep your shoes in a mudroom or garage, shake them out
before putting them on.

42. The brown recluse's body doesn't grow to be larger than 1/2
inch. If you're looking at a spider that's larger than this, it's a
different type of spider.
Body width

43. Brown Recluse Spider
Classification
* Kingdom :
Animals
* Phylum :
Arthropods
* Subphylum :
Chelicerates
* Class :
Arachnids
* Order :
Spiders
*Infraorder :
True Spiders
*Family :
Recluse Spiders
*Genus :
Recluse Spiders
*Species :
Brown Recluse

44. 1
Brazilian Wandering Spider

45. Appearance
Brazilian wandering spiders are large, with bodies reaching up to two
inches (5 centimeters) and leg spans reaching five or six inches (12 to
15 cm). The species vary in color, though all are mostly brown and
may have a black spot on their bellies.
Their most distinctive physical characteristic is seen under threat: if
frightened, Brazilian wandering spiders lift their two front legs up
high in a dramatic and intimidating posture. This exposes the scarlet
hair surrounding the fangs on some species. Their threatened stance
serves as a “back off” gesture, indicating to predators that the
poisonous spider is ready to attack.

46. Identifying
* Note the color of the spider; most wandering
spiders will be yellow-brown and have black stripes.
* Take note of the eyes. Their 8 eyes are arranged in
3 rows. The first row has 2 eyes, the second row has
4 eyes and the third row has 2 very widely separated
large eyes.
•Look at the legs; they will have black bands and each
leg has 2 or sometimes 3 claws.

47. Brazilian Wandering SpiThese arachnids are called “wandering” because of their hunting
behavior. Unlike most spiders that catch their prey in webs, these spiders
wander on the ground, searching for prey, which they kill by both
ambush and direct attack. They spend most of their days hiding under
logs or in crevices, and come out to hunt at night. They eat insects, other
spiders, and sometimes, small amphibians, reptiles and mice.
Brazilian wandering spiders prefer forest floor environments with dark,
moist leaf vegetation. They’re also often found at banana plantations,
living under dried banana leaves. These spiders are known to come to
cities and human dwellings, and there are known populations in Sao
Paulo and Rio de Janeiro.
Because of the toxicity of their bite and their alarming-looking posture,
these spiders have a reputation for being aggressive. But these are
actually defense behaviors. They will only bite or raise their front legs
if they feel threatened.

48. Brazilian Wandering Spider Habitats
* Spot these spiders on the ground, or inside homes during daylight
hours when they tend to hide from the light. Some common
places to spot them are: In the folds of linens and clothes
Boxes
•Shoes and boots
•Cars
* Firewood piles
* Outdoor sheds and garages
* Closets (or any dark, secluded spaces in a house)

49. Brazilian Wandering Spider Reproduction
All spiders produce silk, a thin, strong protein
strand extruded by the spider from spinnerets
most commonly found on the end of the
abdomen. Many species use it to trap insects in
webs, although there are many species that hunt
freely such as the Brazilian Wandering spider.
Silk can be used to aid in climbing, form smooth walls for burrows,
build egg sacs, wrap prey and temporarily hold sperm, among other
applications.
Brazilian Wandering spiders reproduce by means of eggs, which are
packed into silk bundles called egg sacs. The male spider must
(in most cases) make a timely departure after mating to escape
before the females normal predatory instincts return.

50. Mature male spiders have swollen bulbs on the end
of their palps for this purpose and this is a useful
way to identify whether the spider is male or female.
Once the sperm is inside the female spider, she
stores it in a chamber and only uses it during the
egg-laying process, when the eggs come into contact
with the male sperm for the first time and are fertilized. The Brazilian
Wandering spiders life cycle is 1 - 2 years.
Brazilian Wandering Spider Reproduction

52. Know what a Brazilian wandering
spider is. Here are some key chara
cteristics.
* Physical features: Up to
1” (25 mm) long with a leg span of up
to 5” (127 mm)
* Venomous: Yes
* Lives in: South and Central America
Eats
*This spider is an active hunter.
It will eat crickets, lizards, insects
and mice.
BrazilianWanderingSpiderRange

53. Brazilian wandering spider bite
Scientists have been studying Brazilian wandering spiders’ bites since
the 1920s, and have discovered that their venom is a complex cocktail
of toxins, proteins and peptides. It affects ion channels and chemical
receptors in victims’ neuromuscular systems, leading to symptoms such
as paralysis, edema, inflammation of the throat and lungs, salivation,
convulsions, and more —including priapism (painful erections
mentioned above).
Children under 10 are at the greatest risk of death by Brazilian
wandering spider bite. Regardless of age, if bitten, one should seek
medical attention immediately. Not all bites have a full dose of venom,
and if a bite is small painkillers may be prescribed. A 2008 Brazilian
study revealed that only 2.3 percent of bites were treated with
antivenom, and that as of that year, only ten deaths had ever been
attributed to the spider’s bite in Brazil. According to the study, “Cases of
serious envenomation are rare (0.5 percent).”

54. Venom from world's deadliest
Brazilian Wandering Spider
It sounds like a most unlikely aphrodisiac. But scientists have
discovered the venom from what’s considered the world’s deadliest
spider could be the secret to bolstering a man’s love life.
Toxins produced by the Brazilian Wandering Spider, or Phoneutria
nigriventer, appear to combat erectile dysfunction within 20 minutes
of entering the body.
Tests carried out on rats show the venom boosts performance by
increasing the release of nitric oxide, a chemical that dilates blood
vessels and improves blood flow. This is similar to how existing
impotence drugs work.

55. Venom from world's deadliest
Brazilian Wandering Spider
The Brazilian Wandering Spider is responsible for killing more people
than any other arachnid. Victims usually die within an hour of being
bitten.
It is also known as the banana spider because of its habit of stowing
away in shipments of the fruit.
In 2008, a supermarket in Chatham, Kent, was forced to close after
an assistant spotted one of the spiders under a box of bananas as she
stacked them.
One in ten men in the UK suffers erectile dysfunction at some point in
their lives.

57. Brazilian Wandering spider
bite symptoms
*Extremely painful bite and immediate
pain.
* Heavy perspiration and drooling

58. Brazilian Wandering spider
Bite Treatment
* Seek medical attention immediately.
* Keep the patient calm and quiet to
avoid spreading the venom.
* An antivenin is available for the bite.

59. Tx2-6 causes male painful erection
Brazilian wandering spider bite
Tx2-6 is another component of the venom of the Brazilian wandering
spider bite. The neurotoxin causes a painful erection for men which
may last for four hours. Bitten persons can also experience drooling
and heavy perspiration.
The Brazilian wandering bite symptoms surely is scary and
threatening. It is important to seek medical attention within 45
minutes right after being bitten by this kind of spider.

60. Brazilian wandering spider Classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Family: Ctenidae
Genus: Phoneutria

61. Ways to Control Spiders in Your Home and
Workplace
Outdoors
* Remove or reduce trash and rubbish from your home or workplace
(eg. woodpiles, boxes, plywood, tires, empty containers, etc.)
* Keep the outside perimeter of the house free from tall grass, weeds
or shrubs especially near the foundation.
* Wear protective clothing, including gloves and covered shoes, when
working outdoors.
* Always check items that have been stored in the garage or in a shed
or outdoors for spiders, webs or sacks before bringing item indoors.
Keep items like gloves or shoes in zip lock bags or sealed containers.

62. Ways to Control Spiders in Your Home and
Workplace
Indoors
* Keep beds away from the walls.
* Don't store boxes or any items under your bed.
* Keep dust ruffles or bed skirts from touching the floor.
* Don't store shoes on the floor or any clothes, towels or other linens
(always shake out shoes and clothes before using).
* Store sports equipment like roller-skates, gardening clothes, gloves,
ski boots in plastic bags that are tightly sealed with no holes.

63. * Vacuum under furniture, closets, under heaters, around all
baseboards and other areas of the house to eliminate habitat.
* Keep screens on windows and fix or replace screens with holes or that
don't fit snugly.
* Seal doors with weather stripping and door sweeps.
* Seal cracks and access holes for electrical conduits or plumbing.
* Remove spider webs and egg sags when found.
Ways to Control Spiders in Your Home and
Workplace
Indoors

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