And Just What Exactly Are Spiders Afraid Of?
Spiders are normally thought of by humans as scary beasts that serve no other purpose than to frighten the living daylights out of us. Well, ok, they control the fly and insect population as well I suppose, but mostly they are just not much fun to discover around the home or office.
But have you ever asked yourself, what are spiders themselves scared of?
Well, I’ve got a few answers for you…
Because they are small, spiders have many enemies.
Many of the larger animals hunt them for food. Common examples being birds, toads & lizards. It is also true that monkeys will hunt and eat them too. And they are also used as food by many of the smaller creatures in the world.
Ticks will attach themselves to a spider and eat away at it for a long time while the spider goes about its business.
But one of the spiders’ worst enemies is the Spider Wasp. They will ruthlessly and very effectively hunt down spiders and use them to feed their young larvae.
Spider wasps are found throughout most of the world. There are about 290 species in the United States and Canada and around 4200 worldwide. Most spider wasps are black, metallic blue, or reddish and measure from 1 to 5 cm (0.4 to 2.0 in) long.
The wings range from clear to smoky-gray or bright red-orange in color. Their extraordinarily long hind legs distinguish spider wasps from other wasps. Spider wasps are usually seen walking on barren ground or in tangled undergrowth searching for prey. As they walk, their wings flicker and their antennae tap the ground. They often break their restless walking with short flights.
A spider wasp quickly subdues the spider it preys on. The wasp’s sting affects the spider’s central nervous system, paralyzing but not killing the spider. Often the spider is too large to carry in flight and the wasp must drag it to the nest. Some species bite off the spider’s legs to make it easier to drag and may drink blood that leaks from the wounds.
The spider wasp places a single spider in each nest, which is often constructed after catching the prey. Some species specialize on trap-door spiders and tarantulas, using the spider’s own burrow for a nest. The wasp lays an egg on the paralyzed spider, which is eventually eaten by the wasp’s larva.
The tarantula hawk is a large, metallic blue-black spider wasp, with violet or bright reddish-orange wings. Tarantula hawks are often seen foraging for nectar on milkweed flowers. These wasps enter a tarantula’s burrow and may risk death in a fierce battle. The wasp usually wins even though the tarantula has poisonous fangs and is much larger than the wasp.
And let’s not forget another most deadly of spider predators…
You and I. Yes we humans are also big enemies of spiders. Besides stepping on them whenever we get the opportunity, the pesticides we use to control other insects will usually kill spiders too.
Nikki Fox, like over 50% of the worlds population suffers from arachnophobia.
For useful advice on how to prevent spiders entering and living in your home or place of work, as well as a very successful and proven cure for arachnophobia, please visit her website www.spiderpanic.com
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Handheld Barcode Scanners Review – Decisions You Must Make Before Buying Barcode Scanners!
Barcode Scanners- Everything You Need To Know
Handheld Barcode Scanners is one of the most recent innovation in making POS or point of sale scans as well as to instantly gain access to specific files in a database. So how exactly does a barcode scanner work? This contraption comes equipped with a light source, light sensor and a lens which is responsible for interpreting the optical impulses to electrical impulses. It reads the barcode image as the light flashes on it and transmits the interpretation to the output center, commonly a computer screen or a cash register.
Among the most common brands in the market for the Handheld Barcode Scanners nowadays are Symbol, Metrologic, Wasp, Adesso, TS, PSC, CCD, CK1, Intermec, Trakker, Datalogic, Standard and Informatics. Though there are a number of brands available, they come with different features for each piece. The weight alone vary, some weigh as little as 9 ounces while others weigh up to 3 pounds. Some are slim while others are more bulky, there are also some which are connected by USB ports and wires while others are wireless and are connected via Bluetooth. For Handheld Barcode Scanners which are wireless, the hand held scanner is powered by a battery; each fully charged battery can scan up to 20,000 scans or can stay on for up to 30 hours. The standard line or range is one hundred and sixty feet; although for some models, there is still room to be able to scan and store outside these lines for one to twelve inches away from the boundary by using the memory mode. For those models which are connected with wires to a station, these can normally extend for up to 5 feet which makes moving it around easier than that with a very short cord. These hand held scanners are now more usually featured with a plug and play feature via a USB plug; this will enable one to instantly connect the scanner to the port station without having to install it with a separate software.
If one is to consider purchasing one of these Handheld Barcode Scanners, there are a few factors to consider to be able to make a wise decision. They would have to first identify the purpose of its use for them to be able to make the right decision. The first thing to consider should be what type of bar code will be scanned; there are two types; the 1 Dimensional and the 2 Dimensional barcode. A one dimensional barcode is that which is most common; these come in a series of vertical bars of different densities thus forming a rectangle. However, for codes which require more information, these are the 2 Dimensional barcodes which looks quite different and may seem like a small pattern, sometimes come in boxed images. The orientation of how the barcode will be scanned is another factor; the most common Handheld Barcode Scanners are those which have linear beams; this is only effective when the scanner has been positioned to be perpendicular to the barcode. The other type is the omni Directional scanner; this is where the scanner is effective in scanning barcode regardless of the orientation of the barcode—may it be horizontal, diagonal or vertical, it will still be able to read and interpret the bars. If the scanner will be used in a specific station much like that of a check out counter, they can opt for the standard scanner which are wired and ported; however, for more versatile needs such as back room or inventory scans, the wireless version or the Bluetooth and memory mode featured scanners would be a better fit. Both the warranty and guarantee of the product will play an essential role in purchasing a scanner; if it will be used in a small scale purpose or business, an extended warranty or those up to 5 years or so may not be required; however for handheld barcode scanners which will be used in industrial environments and will require a huge number of scans and storage needs, those models with specified warranties which extend for long periods of time may be more essential.
Copyright (c) 2009 Chris John
Finally, If you are looking for the cheapest and most advanced and durable handheld barcode scanners currently on the market with optimum performance specifications then check out this handheld barcode scanners list for a comprehensive items list of different handheld barcode scanners to compare the prices and choose the cheapest and best ones with the specifications that suit your business most!
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