Monday, March 31, 2008

Honey Bee

Honey bees (or honeybees) are a division of bees which symbolize a far smaller fraction of bee multiplicity than most people believe; of the approximately 20,000 known species of bees, there are only seven presently-recognized species with a total of 44 subspecies. These bees are the only living members of the tribe Apini, all in the genus Apis, and all of which manufacture and store liquefied sugar ("honey") to some degree, and create colonial nests out of wax secreted by the workers in the colony. Other types of related bees produce and store honey, but only members of the sort Apis are considered true honey bees.

Saturday, March 29, 2008

Scorpions

Scorpions are eight-legged arthropods. A member of the Arachnida class and belonging to the order Scorpiones, there are about 2000 type of scorpions. They are found broadly distributed south of 49° N, except New Zealand and Antarctica. The northern-most part of the world where scorpions live in the wild is thinness on the Isle of Sheppey in the UK, where a small colony of Euscorpius flavicaudis has been occupant since the 1860s.

The cuticle makes a tough shell around the body. In some places it is covered with hairs that act like equilibrium organs. An outer layer that makes them luminous green under ultraviolet light is called the hyaline layer. Newly molted scorpions do not glow awaiting after their cuticle has toughened. The luminous hyaline layer can be integral in fossil rocks that are hundreds of millions of years old.

The confidence that scorpions commit suicide by harsh themselves to death when surrounded by fire is of considerable relic and is often prevalent where these animals exist. It is nevertheless untrue since the venom has no effect on the scorpion itself, nor on any member of the same species. The misapprehension may obtain from the fact that scorpions are poikilotherms (cold-blooded): when showing to passionate heat their metabolic processes break down. This causes the scorpion to spasm wildly and this spasming may appear as if the scorpion is hurtful itself. It is also untrue that alcohol will cause scorpions to sting themselves to death.


Friday, March 28, 2008

Crustaceans

The crustaceans are a large group of arthropods, comprising roughly 52,000 described species, and are typically treated as a subphylum. They include various familiar animals, such as lobsters, crabs, shrimp, crayfish and barnacles. The majority are marine, living in either fresh water or marine environments, but a few groups have modified to earthly life, such as worldly crabs, terrestrial hermit crabs and woodlice. The majority are motile, moving about separately, although a few taxa are sponging and live attached to their hosts (including sea lice, fish lice, whale lice, tongue worms, and Cymothoa exigua, all of which may be referred to as "crustacean lice"), and adult barnacles live a sessile life — they are attached head-first to the substrate and cannot move autonomously.

The scientific study of crustaceans is known as carcinology. Other names for carcinology are malacostracology, crustaceology and crustalogy, and a scientist who works in carcinology is a carcinologist, crustaceologist or crustalogist.

Thursday, March 27, 2008

Orthoptera

The Orthoptera are an order of insects with paurometabolous or partial metamorphosis, including the grasshoppers, crickets and locusts. Many insects in this order make sound by rubbing their wings alongside each other or their legs, the wings or legs containing rows of grooved bumps. The tympanum or ear is located in the front tibia in crickets, mole crickets, and katydids. These organisms use vibrations to locate other individuals.

Orthopterans have two pairs of wings; the forewings or tegmina are narrower than the hind wings and toughened at the base. They are held overlapping the stomach at rest. The hind wing is membranous and held folded fan-like under the forewings when at rest. They have mandibulate mouthparts, large compound eyes, antennae length varies with species. Their saltatorial hind legs are extended for jumping.

Orthopteroid species have a paurometabolous life cycle or regular metamorphosis. Most grasshoppers lay their eggs in the ground or on foliage. The eggs emerge and the young nymphs look like adults but lack wings and at this stage are often called hoppers. Grasshoppers are able to fold their wings, placing them in the group Neoptera. Through consecutive moults the nymphs develop wings until their final moult into a grown-up adult with fully developed wings.

Wednesday, March 26, 2008

Cockroaches

Among the most well-known type are the American cockroach, Periplaneta americana, which is about 30 mm (1 inch) lengthy, the German cockroach, Blattella germanica, about 15 mm (1/2 inch) lengthy, the Asian cockroach, Blattella asahinai, also about 15 mm (1/2 inch) in length, and the Oriental cockroach, Blatta orientalis, about 25 mm (3/4 inch). Humid cockroaches are often much bigger, and destroyed cockroach relatives such as the Carboniferous Archimylacris and the Permian Apthoroblattina were numerous times as large as these. Cockroaches are commonly considered vermins; however, only about 30 species (less than 1%) swarm urban habitats.

Cockroaches are most common in humid and subtropical climates. Some species are in close connection with individual dwellings and generally found around refuse or in the kitchen. Cockroaches are generally omnivorous with the exemption of the wood-eating genus Cryptocercus; these roaches are powerless of digesting cellulose themselves, but have symbiotic relationships with various protozoans and bacteria that digest the cellulose, allowing them to remove the nutrients. The resemblance of these symbionts to those in termites are such that the genus Cryptocercus has been believed to be more closely related to termites than to other cockroaches, and current research muscularly supports this hypothesis of relationships.

Tuesday, March 25, 2008

Butterfly

A butterfly is an insect of the order Lepidoptera. Like all Lepidoptera, butterflies are prominent for their curious life cycle with a larval caterpillar period, an immobile pupal stage, and a impressive metamorphosis into a familiar and colourful winged adult form. Most species are day-flying so they habitually attract attention. The varied patterns formed by their brightly coloured wings and their unreliable yet graceful flight have made butterfly watching a fairly popular hobby.

Butterflies encompass the true butterflies (superfamily Papilionoidea), the skippers (Superfamily Hesperioidea) and the moth-butterflies (Superfamily Hedyloidea). Butterflies reveal polymorphism, mimicry and aposematism. Some are known to voyage over large distances. Some butterflies have evolved symbiotic and sponging relationships with social insects such as ants. Butterflies are vital cheaply as one of the major agents of pollination. In addition, a number of species are pests, because they can damage domestic crops and trees.

Monday, March 24, 2008

Spider

Spiders are rapacious invertebrate animals that have two body segments, eight legs, no chewing mouth parts and no wings. They are confidential in the order Araneae, one of several orders within the larger class of arachnids, a group which also contains scorpions, whip scorpions, mites, ticks, and opiliones (harvestmen). The study of spiders is known as araneology.

All spiders produce silk, a thin, strong protein filament extruded by the spider from spinnerets most normally found on the end of the abdomen. Many species use it to trap insects in webs, though there are also many species that hunt generously. Silk can be used to aid in climbing, form smooth walls for burrows, build egg sacs, wrap prey, and provisionally hold sperm, among other applications.

All spiders excluding those in the families Uloboridae and Holarchaeidae, and in the suborder Mesothelae (together about 350 species) can insert venom to protect themselves or to kill and dissolve prey. Only about 200 species, however, have bites that can pose health problems to humans. Many larger species' bites may be quite tender, but will not produce lasting health concerns.

Tuesday, March 18, 2008

Beetles

Beetles are a group of insects which have the major number of species. They are placed in the order Coleoptera, which means "covered wing" and contains more described species than in any other order in the animal kingdom, constituting about twenty-five percent of all known life-forms.[1] Forty percent of all described insect species are beetles (about 350,000 species[1]), and new species are repeatedly discovered. Estimates put the total number of species, described and undescribed, at between 5 and 8 million.

Beetles can be found in almost all habitats, but are not known to occur in the sea or in the polar regions. They work together with their ecosystems in several ways. They often use to eat plants and fungi, break down animal and plant debris, and feed other invertebrates. Some species are victim of various animals including birds and mammals. Certain species are agricultural pests, such as the Colorado potato beetle Leptinotarsa decemlineata, the boll weevil Anthonomus grandis, the red flour beetle Tribolium castaneum, and the mungbean or cowpea beetle Callosobruchus maculatus, while other species of beetles are important controls of agricultural pests. For example, coccinellidae ("ladybirds" or "ladybugs") consume aphids, scale insects, thrips, and other plant-sucking insects that destroy the crops.