
The
Funnelweb Spider
An
arachnophobes worst nightmare
"It
is true that of the 10 most poisonous arachnids on the planet, Australia has 9
of them. Actually, it would be more accurate to say that of the 9 most poisonous
arachnids, Australia has all of them. " Douglas Adams
For
arachnophobes, the Funnelweb shows that fear of spiders is not unjustified. Big
black and hairy, it can grow to a length of 4.5 cm. Its fangs are equally impressive.
The size of a cats claws, they literally drip with venom powerful enough
to kill several adult humans. Like a snake, it strikes them down from a height
with a force powerful enough to pierce a fingernail.
Befitting its intimidating appearance, is its venom. The venom contains a toxin
called atraxtoxin which attacks the nerves - sending thousands of electrical
impulses through them. Muscles twitch violently and the victim experiences a profuse
flow of sweat, tears and saliva. If left untreated, the victim can suffer respiratory
collapse, slip into a coma, suffer brain damage and die. The Funnelweb has killed
people in less than 15 minutes. No other spider has killed people in less than
two hours.
Curiously, the Funnelweb's venom
only affects primates (ie humans) which lack a substance in their blood that inactivates
the venom. Other mammals such as koalas, rats, magpies and possums are relatively
immune.
On the positive side, Funnelwebs
don't nest in houses so contact with humans is rare. They dig themselves a burrow
in moist gardens, set up tripwires and attack any cockroaches or beetles that
come there way. But occasionally the hunter becomes the hunted as they face
aggressive predatation from centipedes, lizards and king crickets.
When
mature, adult males leave their burrows and head off in search of females and
may occasionally wander into houses and garages. They try to move by night so
as to avoid predatation from reptiles, birds and small marsupials. By
day they will seek refuge under logs or in shoes. Homeowners are generally advised
that when the Funnelweb is about, leaving one's ugg boots outside, no matter how
smelly they are, really isn't a wise move.
Sometimes
the spider may fall in into backyard swimming pools where they can float supported
by air bubbles trapped among their body hairs. If swimming, it is generally advised
to avoid touching fluffy balls of black hair.
Although
they may be a nasty piece of work and are very common throughout Eastern Australia,
deaths from Funnelwebs are rare. Prior to the introduction of antivenom in 1980,
there had only been 13 known fatalities. Since the antivenom has been in use,
no deaths have been recorded.
Icon
An
Internet Service Provider is known as Funnelweb Internet.
Industry
1)Pesticides
- The Funnelweb's venom may form the basis for new, environmentally friendly
pesticides. Tests on one toxin indicate that it kills insects quickly but has
no impact on the cells of humans or other mammals.
2) Eradication - Although there is little money in breeding the Funnelweb,
there is a great industry based on destroying them. Unfortunately, pest control
may also kill or drive away the crickets, centipedes, frogs, lizards, birds and
other spiders that prey on the Funnelweb or compete with them for food.
As
new Funnelwebs simply move in from the neighbour's property, in the absence of
predators and competitors, they can breed unfetted.