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Friday, 13 December 2013

Insects

  

this lens' photo


Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and two antennae. They are among the most diverse groups of animals on the planet and include more than a million described species and represent more than half of all known living organisms. The number of extant species is estimated at between six and ten million, and potentially represent over 90% of the differing metazoan life forms on Earth. Insects may be found in nearly all environments, although only a small number of species occur in the oceans, a habitat dominated by another arthropod group, the crustaceans.
The life cycles of insects vary but most hatch from eggs. Insect growth is constrained by the inelastic exoskeleton and development involves a series of molts. The immature stages can differ from the adults in structure, habit and habitat and can include a passive pupal stage in those
groups that undergo complete metamorphosis. Insects that undergo incomplete metamorphosis lack a pupal stage and adults develop through a series of nymphal stages. The higher level relationship of the hexapoda is unclear. Fossilized insects of enormous size have been found from the Paleozoic Era, including giant dragonflies with wingspans of 55 to 70 cm (22-28 in). The most diverse insect groups appear to have co evolved with flowering plants.

25 Most dangerous bugs 

Tsetse Fly


 Also known as tik-tik flies, are large biting flies that inhabit much of mid-continental Africa between the Sahara and the Kalahari deserts.They carry a chemical called trypanosomes,  which causes sleeping sickness among humans.
more info.- 
www.britannica.com/EBchecked/topic/607699/tsetse-fly
www.who.int/trypanosomiasis_african/vector/en/
travel.gc.ca/travelling/health-safety/diseases/trypanosomiasis
www.nytimes.com/.../tsetse-fly-genome-is-solved-raising-hope-in-battlin..
www.sciencemag.org
dictionary.reference.com/browse/tsetse+fly


Giant Japanese or Asian Hornet

The Asian giant hornet,including the subspecies Japanese giant hornet, colloquially known as the yak-killer hornet, is the world's largest hornet, native to temperate and tropical Eastern Asia.This type of hornet is not inherently aggressive and only attacks humans when threatened. Its venom, however, attacks the nervous system and can kill a person with just a single sting.
More info -
en.wikipedia.org/wiki/Asian_giant_hornet
video.nationalgeographic.com/video/bees_vs_hornet
natgeotv.com/uk/nature-uncut/.../attack-of-the-japanese-giant-hornets
a-z-animals.com/animals/asian-giant-hornet

Siafu Ants

The siafu, is a large group of army ants found primarily in central and east Africa, although the range also extends to tropical Asia.Their jaws are very powerful and typically leave two puncture wounds when removed. Although they typically do not kill humans, a large number can easily kill or immobilize small animals.

Brown Recluse

Brown recluse spiders are usually between 6-20 mm but may grow larger. These spiders usually have makings on the dorsal sides of their cephalothorax, with a black line coming from it that looks like a violin with the neck of the violin pointing to the rear of the spider,resulting in the nicknames fiddleback spider,brown fiddler or violin spider.

Fire Ants

Fire ants are a group of stinging ants that can be distinguished from other types of ants through their copper brown head.Fire ants bite and spray formic acid on attackers,causing irritation,pain and in extreme cases death.


Fleas

 Fleas are the insects forming the order Siphonaptera. They are wingless,with mouthparts adapted for piercing skin and sucking blood.Although not typically thought of as dangerous,fleas transmit numerous diseases between animals and people and throughout history have helped facilitate things like the bubonic plaque.

Africanized Honey Bee

Africanized honey bees,known colloquially as "Killer bees" are some hybrid varieties of the Western honey bee species,produced originally by cross-breeding of the African honey bee,with various European honey bees such as the Italian bee and the Iberian bee.The hybrid bees are far more defensive than any of the various European subspecies.Small warms Africanized bees are capable of taking over European honey bee hives by invading the hive and establishing their own queen after killing the European queen bee.

Rat Fleas


The Oriental rat flea also known as the tropical rat flea,is a parasite of rodents,primarily of the genus rattus and is a primary vector for bubonic plague and murine thypus.They also act as a host for tapeworms and can carry life threatening diseases from one person to another through their eggs.

Anopheles Mosquito

Best known for transmitting malaria as well as other diseases.These mosquitos have been responsible for numerous epidemics in the tropical regions of the world.

Brazilian Wandering Spider

Brazilian Wandering Spider,are a genus of aggressive and venomous spiders of potential medical significance to human.They are mainly found in tropical South Africa,with one species in Central America.These spiders are members of the Ctenidae family of wandering spiders.The Brazilian wandering spiders appear in Guinness world records from 2010 as the world's most venomous spider.Guinness World Records states that although the Brazilian wandering spider is the most toxic,an effective antivenom is available and few fatalities occur.

Bullet Ants

Bullet ants,named on account of its powerful and potent sting.It inhabits humid lowland rainforests from Nicaragua and the extreme east of Honduras south to Paraguay.The bullet ant is called hormiga veinticuatro or 24 ant by the locals,referring to the 24 hours of pain that follow being stung.

Assassin Bugs

Well known for carrying Chagas disease,these parasitic bugs often infect people living in poor,rural parts of the Americas.

Black Spitting Thick Tail Scorpion

The Black Thick-tailed Scorpion is a common and widespread species through the drier desert and scurbland area of Southern Africa.Like many scorpions it is most active after dark,particularly in the summer and more especially after rain storms.Scorpions spend the hot days hidden under stones or under the bark of dead branches where it can pose a threat to people gathering wood for domestic fire.They are most known for their thick tails and thin claws.These scorpions have the ability to spit out venom through their tails.They stings can cause pain,paralysis and death among humans.

House Centipedes

House centipedes are most know for their pairs of venom claws called forcipules.Their bites are deemed hazardous to humans because they are very painful and can cause severe swelling that can last for days.

Human Bot Flies

The human botfly,Dermatobia hominis,is one of several species of fly the larvae of which parasitise humans.It is also known as the torsalo or American warble flies,human botflies are typically transfered by mosquitoes and ticks.When a mosquito carrying the larva of a human botfly lands on the human skin,it drops off the larva onto the skin and leaves it there.After a few days, this larva develops under the layer of the skin and may cause serious infection if not immediately treated.

Bed Bugs


Bed bugs a longstanding human parasite,while they may not cause excruciating pain or death,their bites can potentially lead to negative psychological effects and allergic symptoms.

Parasitic Worms

Parasitic worms are a type of eukaryotic parasitel.Most parasitic worms are known to dwell inside the digestive tract of humans and cause insomnia,vomiting,nausea and numerous other issues.

Cockroaches

One of best known disease carrying bugs,cockroaches have been known to carry numerous disease agents that can be very dangerous to humans.Cockroaches can live for months without food and water.

Puss Caterpillars

The puss caterpillar looks like you could reach out and pet it,but looks can be deceiving.Underneath that long,blond hair,venomous bristles hide.Even a molted skin can cause a serious skin reaction.

Black Widows

The venomous bite of these spiders is considered particularly dangerous because of the neurotoxin latrotoxin,which causes the condition letrodectism,both names for genus.The female black widow has unusually large venom glands and her bite is particularly harmful to humans,however Latrodectus bites rarely kill if proper medical treatment is provided.

Yellow Jackets

Although most yellow jackets are little more than a pest,certain species such as the German yellow jacket of North America are bold and aggressive,and if provoked, they can sting repeatedly and painfully.

Army Ants

The name army ant is applied to over 200 ant species,in different lineages,due to their aggressive predatory foraging groups,known as raids,in which huge numbers of ants forage simultaneously over a certain area.Another shared feature is that,unlike most ant species,army ants do not construct permanent nests,an army ant colony moves almost incessantly over the time is exits.All species are members of the true ant family,Formicidae,but several groups have independently evolved the same basic behavioral and ecological syndrome.

Deer Tick

Every year the Deer Tick infects many people with Lyme Disease.Lyme Disease begins with a rash around the bite resembling a bull's eye.Early symptoms include headache and fever.As time passes, the victim will suffer stiff joints and heart problems.

Lice

Most lice are scavengers,feeding on skin and other debris found on the host's body,but some species feed on sebaceous secretions and blood.Most are found only on specific types of animal,and,in some cases,only to a particular part of the body,some animals are known to host up to fifteen different species,although one to three is typical for mammals and two to six for birds.Although like termites they are not always dangerous to humans in the classic sense they do have the ability to transmit diseases.

Termites

While they are not dangerous in the typical sense of the word as they play a critical role in the environment and even in some culture's diets,they have the potential to cause major damage to crops and infrastructure.