Showing posts with label spider. Show all posts
Showing posts with label spider. Show all posts

Trapdoor Spider has Declining Population

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Times are a changin', as the saying goes. And it is not always for the best. Trapdoor spiders are getting fewer in South Australia. They balance the ecosystem, so their loss is a bad thing.  If they do not eat beetles, for example,  the Coleopltera will run amok. | not. |◀|
Trapdoor spider
Surveys on the numbers show a sharp decline. In 18 days in the 1950s 122 specimens were found. A search in 2014 caught only 18 in ten days. No research has been done to see what is happening nationwide. | ▶ | not. | ▶ |

The arachnid has its weaknesses. Each builds its burrow when it is immature. The retreat is home for its whole life. If the lair is damaged it cannot be rebuilt. Its positive point is longevity: it can live for 30 years.| ▶ | not. | ▶ |                                      | ▶ not | ◀ |
BiOLOGY 
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LEGGIES ARE FEWER
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Spider Face May Not Scare You

Spider fright is laughable, scare.funny pictures
Cool smiling face on back of spider
"This will give them a shock!"
spider face scare you  .
Aberrant Beast Pictures

scare you spider face funny
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DISTURBING SMILE
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Australia - Interesting Things

science
Interesting things abound about Australia. It is a unique continent being isolated from the other land masses for millions of years. Animals have evolved with unusual behaviors. The cute, tiny Antichenus gets so high on testosterone that the little fellow doesn't eat or drink. He mates until he dies.
antichenus
The ugliest fish live in the deep sea off Australia's coast. They have large eyes, a necessity where light is almost total nonexistent.  Land creatures have evolved where some beauty is required to facilitate mating.  living in the darkest depths means seeing your mate is not so important, but large eyes, huge jaws and venomous spines are.
Australia's ugliest sea monsters
Tourists and locals know about the deadly creatures living here. Oddly, Funnelweb spiders are not dangerous to dogs, cats, mice, lizards or snakes. An unlucky human can die if bitten by this spider.  Muscles in our bodies fibrillate.  Unsynchronized contraction of heart muscles can kill us.
Bundaberg is the home of the world's oldest tagged turtle. X23103 is a flatback turtle. The tag was put on in 1976 and she has been tracked ever since. The old lady continues on her way at the age of 60 years.
X23103 oldest  tagged sea turtle
Europe is well known for its stinging nettles. Children try all ways to stop the painful sting. Australia has the little known Gympie-Gympie stinging nettle. If its large leaves are just touched by human skin a part of the leaf breaks off and embeds itself so that it cannot be removed. It is a painful reminder to steer clear of it.
Image result for gympie gympie stinging plant
Forget Brazil and the rest of South America, Australia has the last remaining regions of wilderness. Cape york on Queensland is virtually untouched native vegetation. It has mangrove swamps, wetlands, tropical raingforests and eucalyptus wooded savannahs, home to ancient wildlife.

cape york wilderness
The longest "range" of volcanoes stretches down the eastern seaboard from Queensland's Pinnacle Rock all the way down to Melbourne. It is three times longer than the Yellowstone National Park volcanic track in the U.S.
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 Science by Ty Buchanan 
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Australia's Redback Spider

One of Australia's best-lmown spiders is the Redback Spider Latrodectus hasseltii, a close relative of America's Black Widow Spider.  It is easily identified by the wonderfully striking orange/red slash on its glossy black (sometimes brown) body.  The Redback Spider was immortalised in Slim Newton’s 1972 hit song Redback on the Toilet Seat:
                   There was a Redbnck on the toilet seat
                       When I was there last night,
                       I didn't see him in the dark but boy
                       I felt his bite.
It Probably wasn't a male spider that bit the man in the toilet. Only the female that bites. A male redback is only about a tenth of the female's size.  He has fangs but they usually can't penetrate human skin.
Redback spider
Redbacks spin their webs in dry sheltered areas under rocks or logs. They also frequent human places - under eaves, floorboards, garden sheds, in junk piles, gardens and the outdoor dunny!  Their webs are spun from spider silk, which is amazing stuff.  It comes from glands in the spider’s abdomen.  Different glands create different silks for varying purposes. Silk can be used for building a web delivering sperm, holding eggs in a sac, lining burrows and catching prey in sticky nets or single threads. You can recognize a redback”s web because it is tangled and rnessy, not a beautiful work of art like the orb weaver’s.

Hundreds of redback bites are reported each year. A Redback Spider bite can be very painful and a victim may also sweat, become weak, feel sick and vomit. The best thing to do is put an icepack on the bitten area and get the person to hospital for treatment.   Someone should try to collect the spider to be sure of its type.  

Thankfully, today there is antivenom that can be injected into the victim to treat the bite.  There have been no deaths from redback spider bites since the antivenom has been available.To make spider antivenom, first you need to get venom from the spider. For redbacks this means dissecting (cutting open) the glands and tissues of the spider. The purified venom is then injected into horses, in small but gradually increasing doses.  The horse produces antibodies to fight the venom. These are taken from the horse using a needle so the life-saving antivenom can be made.

Spiders are arthropods. They have an exoskeleton, an outer skeleton.  They moult and shed their outer skeleton as they grow, replacing it with a new, larger exoskeleton.  Most spiders are nocturnal, being active at night.  Silk line can be as thin as 0.004 millimetres.  Some spiders create silk to cast lures while others use silk to help build a cover for their home's entrance. and others use silk to travel on the wind. Net casting spiders make a small web, a net, which they stretch out to catch their prey.   Jumping spiders stand and jump on their prey. 
 Australiana by Ty Buchanan 
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New Peacock Spider Species in Australia

The discovery of new species in Australia is no longer a surprise. However, it is extremely interesting. Jumping (peacock) spiders, Salticidae, are the largest family of the Araneae. Peacock spiders are so called because of their bright colors.
Skeleton spider Skeletorus, Maratus sceletus
Two new species have been identified. They are named Skeletorus, Maratus sceletus, and Sparklemuffin, Maratus jactatus. The former is black with white stripes and some blue in the background. It does look like a skeleton. Sparklemuffin is blue with a unique red pattern.

Peacock spiders jump and dance around showing off their colorful abdomens. Due to prevalent predators males need to be seen by females to successfully breed and continue their existence. They have adapted well and have diversified into many types.
Science by Ty Buchanan
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If you want to see weird animals go visit Australia. Most animals are spread throughout the world but Australian marsupials stay strictly at home on this "lost continent". Two hundred kinds of marsupials live only in Australia the kangaroo being the most commonly known.

When the platypus was first taken to England scientists of the day said it was a hoax, a made up animal. The koala seemed to be a cuddly bear. Unfortunately wild koalas can be very nasty and do not take kindly to being picked up. So aligned to its environment, the Tasmanian Tiger soon became extinct with the arrival of Europeans.

Besides marsupials, other creatures make life difficult for people living on this continent. Red back and funnel web spiders are dangerous. The box jellyfish also causes much pain to humans. Small animals have died from their sting. Don't let the presence of these put you off from a visit to this great country. Oh, I nearly forgot; crocodile lives up north.
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Nature
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Spider Eats Bird



Is it safe to go out? Well maybe not. A spider was seen eating a bird in Cairns, north Queensland.

The golden orb weaver spider usually eats insects. It is a step up for it to consume a bird. The bird had flown into the spider's web and become weak. Then the spider attacked it.

Golden orb spiders grow much larger than the one shown in the photograph. Though they were not thought capable of eating a whole bird.
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Science
TwitThis

Strange Animals Live in Australia

If you want to see weird animals go visit Australia. Most animals are spread throughout the world but Australian marsupials stay strictly at home on this "lost continent". Two hundred kinds of marsupials live only in Australia the kangaroo being the most commonly known.

When the platypus was first taken to England scientists of the day said it was a hoax, a made up animal. The koala seemed to be a cuddly bear. Unfortunately wild koalas can be very nasty and do not take kindly to being picked up. So aligned to its environment, the Tasmanian Tiger soon became extinct with the arrival of Europeans.

Besides marsupials, other creatures make life difficult for people living on this continent. Red back and funnel web spiders are dangerous. The box jellyfish also causes much pain to humans. Small animals have died from their sting. Don't let the presence of these put you off from visit this great country. Oh, I nearly forgot, the crocodile lives up north.
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