It's a Spider's World! (and Introducing Poecilotheria rajaei)

Arachnids never lose power to fascinate

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the feared Brazilian Wandering Spider in attack modeEye pierced by urticating hairsShowing the fearsome fangs of the Sydney Funnel Web spiderThe beautiful and deadly (to its prey) Poecilotheria rajaeiA tarantula throwing urticating hairs
the feared Brazilian Wandering Spider in attack mode
the feared Brazilian Wandering Spider in attack mode | Source
Eye pierced by urticating hairs
Eye pierced by urticating hairs | Source
Showing the fearsome fangs of the Sydney Funnel Web spider
Showing the fearsome fangs of the Sydney Funnel Web spider | Source
The beautiful and deadly (to its prey) Poecilotheria rajaei
The beautiful and deadly (to its prey) Poecilotheria rajaei | Source
A tarantula throwing urticating hairs
A tarantula throwing urticating hairs | Source

Arachnids are an evolutionary success story.

This contributor has published many articles on Hubpages and elsewhere about insects and "creepie-crawlies, in particular, arachnids. They, like snakes, have been interesting because many of them have unecessarilly aroused fear in people who should really know better.

Spiders have a lot of misinformation spouted and published about them. One sobriquet designed to confuse is "dangerous." I suppose one could divide this into dangerous and potentially dangerous. Whether any wild creature is dangerous depends unsually in large part to whether the victim was stupid or genuinely attacked for one of two main reasons: They are 1) Defense or 2) Seen as Prey. Some creatures on the planet are the most dangerous because they always, given the right conditions, see mankind as prey. This includes crocodiles, polar bears and, to a lesser extent, sharks. Other large predators such as lions, tigers, other bears, etc., are sometimes predatory towards man, but more often maul and kill for defense and otherwise ignore us or shy away from our guns.

When we get into the world of the insect and the arachnid, only biting insects like mozzies see us as a meal on the hoof. We might include reduuvid bugs (Chagas) and vampire bats here and there are a few more blood suckers. But no spider to my knowledge sees the giant, man, as prey; same for scorpions and tarantulas. So their attack will be defensive, with the possible exception of the Brazilian Wandering Spider who does have a nasty disposition and the worst venom to go with it. (Check your Tesco bananas!). But of the handful of truly venomous spiders that remain, they won't bite you if you don't compromise their safety or otherwise annoy them.

Of course, where creatures are concerned laws are like piecrusts, made to be broken; in the tiny organ that serves as a brain for these simple creatures, mistakes are made. Brown Recluse spiders will get in your bed and your shoes and might bite you if you move over them or lower a large foot on top of them...Black Widows resent being moved from behind the water tank! But this is still really covered by defensive biting.

Tarantulas can be mostly handled with impunity and won't think of biting...even if they do, it may be a "dry" warning nip from those large fangs, no venom injected. We have found that about one half of tarantula bites are of this kind; of the other 50%, venom is injected with some mild to fairly serious symptoms being experienced (but no reported deaths to date). Usually, a greater menace is their ability to throw-off "urticating hairs" which can get in an aggressor's eyes, painful and even blinding. The New World 'taras are the worst urticators, Old World tarantulas have stronger venom and less ability to urticate.

Snakes are also capable of witholding venom from a strike and rattlesnakes often use this option if they were not unduly threatened. They don't want to kill us, just get us to "walk on by" and leave them alone.

The terms dangerous and venomous are interchangeable. But some large spiders, particularly the Brazilian and the Sydney Funnel Web should be seen as extremely dangerous because if they do bite with malice aforethought you might well be dead in short order. You only have to see a large female funnel web, 3/4 inch fangs dripping with venom as she rears to strike to know that your health is in danger if you don't move out of range quickly. The Brazilian is reported to have chased people or their pets round their houses! And most spiders can also jump!

But Black Widows and Recluses, among many smaller yet venomous spiders, once located, can't be thought of as dangerous...and the same applies to the less intelligent scorpions who never attack man if not seriously molested.

In the UK, all the house spiders and wolf spiders who visit or live in your homes are completely harmless and should be either left alone or removed carefully and released some distance from your house.

A New Species

It's quite extraordinary, but we are finding new species of arachnids all the time. Like the Poecilotheria rajaei, found in Shri Lanka recently. This tarantula is one of the world's largest, positively huge with an 8-inch leg span. (that about covers your face!). It is also one of the fastest moving and most venomous, its bite has made some human victims ill, but it is still not seen as fatal to man, but a killer to all small mammals, reptiles and birds, etc.; some reports have it killing small pets.

Rajeai is related to the world's largest tarantula, the South American Goliath, often misleadingly called the "bird-eating tarantula." Actually, rajeai probably puts paid to more birds than does poor old Goliath, as it is mainly aboreal, only abandoning its usual habit due to forestation and man's destruction of its habitat as villages and towns expand. This why it has been such a long time waiting discovery, but several family members have now been found in Shri Lanka and India.

In fact, spiders are predators of many small animal groups. Every continent apart from Antarctica has bat-catching and consuming spiders. Many countries (including the UK) have fish-eating spiders. They can immobolise fish twice their weight and do so fast with a powerful neurotoxin. None of these arachnids are a danger to man which may be a good thing as their venom must be some powerful substance to stop fish and bats in seconds! Many fish were probably investigating the spider's tantalising front legs in order to eat them...a real case of Shakespeare's the "Biter was Bit!"

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Comments 14 comments

Debby Bruck profile image

Debby Bruck 22 months ago

I didn't know they found a new species. I think many people are interested in nature and enjoy going into the wilderness to be an explorer when they come upon something they have never seen before. What a pretty spider; almost like a butterfly.


diogenes profile image

diogenes 22 months ago from UK and Mexico Author

Hi Debbie: Wow, someone else who thinks spiders are attractive!

Thanks for visit and kind comment

Bob


WillStarr profile image

WillStarr 22 months ago from Phoenix, Arizona

When I lived on five acres west of Tucson, we often had tarantulas crawling on our porches during mating season. Most drivers tried to avoid running over them on the roads, but they were everywhere. And yes, they're harmless if you leave them alone.


naturegirl7s profile image

naturegirl7s 22 months ago from Covington, LA

The large and beautiful golden orb spider lives here in the forests of South Louisiana. Many years ago a workman unknowingly disturbed the web of a really large female and she made very loud and distressing noises. Until then I didn't know that they could "verbalize". ;)

We also have a species of trap door or funnel web spider. When the webs are covered with dew it is an eerie yet lovely site.


diogenes profile image

diogenes 22 months ago from UK and Mexico Author

Hi naturegirl. Large spiders and taras can make a range of sounds, some quite loud; the Golden Orb is a lovely spider and many spider's webs and trapdoor web material looks gorgeous with frost or dew; so delicate and yet so strong...

Bob


diogenes profile image

diogenes 22 months ago from UK and Mexico Author

Hi Will. I am sure that "spider sense," a sort of sixth sense peculiar to spiders does exists. They can often tell just by how you look at them if they are in danger or not. Many creatures have such fine tuned senses anyway - the instinct we have lost through the ages.

Bob


Genna East profile image

Genna East 22 months ago from Massachusetts, USA

Chills…arachnids give me chills. But you are right about their tenacity, and their ability to survive. We have to admire them for their instinctive and evolutionary grip on this world. Interesting article, Bob.


diogenes profile image

diogenes 22 months ago from UK and Mexico Author

Hi Genna.. for hundreds of millions of years they have been a top creature. Imagine the giants of yesterday 18 inches across and more...Help!

It's normal to be respectful of them because they all carry venom, but most could not penetrate our skin and the venom would be like an ant bite.

Thanks for popping in Bob x


Au fait profile image

Au fait 22 months ago from North Texas

Have you read my article about wolf spiders and warf spiders yet?

Another great article here. Going to share it and see if I can get you some readers. Note you've been busy writing again lately.

Good to see you back. Hope things are going well for you and that you're feeling on top of the world. Take care . . xx


diogenes profile image

diogenes 22 months ago from UK and Mexico Author

Hiya Misty: Yes. I have found a new (late) love and it's been like a muse...we haven't met yet, going to do so in Barcelona March

How about you, do you have a hairy monster now??

Bob xoxoxo

I think I did read you article, but if I didn't leave a comment I probably missed it...forgive me


Randy Godwin profile image

Randy Godwin 22 months ago from Southern Georgia

I too admire spiders, Bob. We have many species here in the swamps and woods of southeastern Ga. Some of the larger spiders have 6' or better webs stretched between trees which feels a bit creepy when you walk into one unawares. Voted up and cool!

RG


diogenes profile image

diogenes 22 months ago from UK and Mexico Author

Blimey, it's the old swampy! How the hell are ye, Randy. Yes, one of the nastiest feeling on the planet is walking into a large spider web...especially when the owner is sitting in the middle of it.

I have friends near you - on St George Island Fla., know it?

Bob


Randy Godwin profile image

Randy Godwin 22 months ago from Southern Georgia

Deed I do, Bob. A beautiful spot your friends live as I've visited there often in the past. Hope you're doin' well yourself you ole Hubber you! :P

Randy


diogenes profile image

diogenes 22 months ago from UK and Mexico Author

If you go again, look up Dianne Dodd who lives in the Plantation near the entrance gate, everyone knows her. She is a wonderful old gal, bright as a spark and very entertaining...say you're a friend of mine through Hubs (Bob Challen)...don't listen to all the muck about me, though!

Bob

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