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Tuesday, January 27, 2009

Butterflies: fascinating butterfly facts and trivia

  • The original name for the butterfly was 'flutterby'!
  • Butterflies range in size from a tiny 1/8 inch to a huge almost 12 inches.
  • Butterflies cannot fly if their body temperature is less than 86 degrees.
  • The Brimstone butterfly (Gonepterix rhamni) has the longest lifetime of the adult butterflies: 9-10 months.
  • The caterpillars of some Snout Moths (Pyralididae) live in or on water-plants.
  • Many butterflies can taste with their feet to find out whether the leaf they sit on is good to lay eggs on to be their caterpillars' food or not.
  • People eat insects – called "Entomophagy"(people eating bugs), many bugs are both protein-rich and good sources of vitamins, minerals and fats.
  • Butterflies and insects have their skeletons on the outside of their bodies, called the exoskeleton (related to crabs and lobsters), keeping water inside their body to keep them from drying out.
  • Female butterflies usually are bigger and live longer than male butterflies.
  • A butterfly has compound eyes: each eye is made up of about 6,000 tiny parts called lenses, which let in light.
  • The female moth produces a scent that a male moth can smell a mile away.
  • Butterflies can’t hear, but they can feel vibrations.
  • Butterflies don't have mouths that allow them to bite or chew.
  • A caterpillar grows to about 27,000 times the size it was when it first emerged from its egg
  • The wings of butterflies and moths are actually transparent.
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Rhopalocera

A butterfly is an insect of the order Lepidoptera. Like all Lepidoptera, butterflies are notable for their unusual life cycle with a larval caterpillar stage, an inactive pupal stage, and a spectacular metamorphosis into a familiar and colourful winged adult form.

Butterflies are characterized by their scale-covered wings. The coloration of butterfly wings is created by minute scales. These scales are pigmented with melanins that give them blacks and browns, but blues, greens, reds and iridescence are usually created not by pigments but the microstructure of the scales. This structural coloration is the result of coherent scattering of light by the photonic crystal nature of the scales.

Both butterflies and moths belong to the order lepidoptera, a Greek which means scale wing.The iridescent scales, which overlap like shingles on a roof, give the wings the colors that we see. Contrary to popular belief, many butterflies can be held gently by the wings without harming the butterfly. Of course, some are more fragile than others, and are easily damaged if not handled very gently. Butterflies along with most moths have a long straw like structure called a proboscis which they use to drink nectar and juices. When not in use, the proboscis remains coiled like a garden hose.

Studies on the reflection and scattering of light by the scales on wings of swallowtail butterflies led to the innovation of more efficient light-emitting diodes. Researches on the wing structure of Birdwing (of Palawan, Philippines) butterflies led to new wide wingspan kite and aircraft designs. The structural coloration of butterflies is inspiring nanotechnology research to produce paints that do not use toxic pigments and in the development of new display technologies. Furthermore, the discoloration and health of butterflies in butterfly farms, is now being studied for use as indicators of air quality in several cities.

Thursday, January 22, 2009

Hercules Beetle: strongest of all

  • Hercules beetles, also called rhinoceros and unicorn beetles, are among the largest beetles in the world.
  • Pound for pound, Hercules beetles are the strongest animal in the world. Some can lift as much as 850 times their own weight.
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Scarabaeidae
Subfamily: Dynastinae
Genus: Dynastes
Species: D. hercules

The male, about five inches (13 cm) long, is one of the largest insects known. Females often have a greater body length but are not as long overall. Males have black heads and a set of forewings that can be shades of green, brown or black, while females are entirely brownish black. A large horn projecting from its upper thorax (chest) and a smaller one from its head resemble pincers. They are mainly found in tropical rainforests in Central and South America, but live as far north as Mexico as well as on some Caribbean islands.

Hercules beetles have a total life cycle of about a year and a half. They live underground as larvae for ten to 16 months, but only live for three to four months as adults.
Adult Hercules Beetles feed on sweet fruits, tree sap, and decaying plant matter. Larvae develop in or around rotten logs and eat decaying wood. Hercules beetles are vulnerable in the wild due to destruction of forests and collection for the pet trade. They are also vulnerable as their natural range is very limited.

Thursday, January 8, 2009

Mouse: adaptable intelligent animal

  • The typical laboratory mouse runs 2.5 miles per night on its treadmill.
  • A rat can walk longer on desert than a camel without drinking water.
  • Mice have tails that are as long as their bodies.
  • Mice see best in dim light. Their eyesight is weak, but their other senses are acute.
  • Mice have teeth that never stop growing. Mice teeth can grow up to 5 inches a year.
  • Mice squeak at very high frequencies, often above the range of human hearing.
  • Mice can jump down 12 feet without injury; they also have a 12-inch vertical jump.
  • Mice explore their territory daily, showing no aversion to new objects (neophobia).
  • The female mouse ovulates every other day.
  • A baby mouse is called a pinky, or a kitten. A female is called a doe. A male is called a buck
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Superfamily: Muroidea
Family: Muridae
Subfamily: Murinae
Genus: Mus

The word "mouse" and the word muscle are related. Muscle stems from musculus meaning small mouse - possibly because of a similarity in shape The word "mouse" is a cognate of Sanskrit mus meaning 'to steal,' which is also cognate with mys in Old Greek and mus in Latin. Mice range in size from 11 to 21 cm (4 to 8 inches) long (including a long tail). They weigh from .25 to 2 oz (7.1 to 57 g). The coat color ranges from white to brown to gray. Most mice have a pointed snout with long whiskers, round ears, and thin tails. Many mice scurry along the ground, but some can hop or jump.

Mice are common experimental animals in biology and psychology primarily because they are mammals, mice also share a high degree of homology with humans. They are the most commonly used mammalian model organism, more common than rats. The mouse genome has been sequenced, and virtually all mouse genes have human homologs. There are other reasons for why mice are used in laboratory research. Mice are small, inexpensive, easily maintained, and can reproduce quickly. Several generations of mice can be observed in a relatively short period of time. Mice are generally very docile if raised from birth and given sufficient human contact. However, certain strains have been known to be quite temperamental. Mice (and rats) have the same organs in the same places, just different proportions.

Mice live for one to two years. They can start having babies at 6-8 weeks old and have 5-10 in each litter (pregnancy lasts 3 weeks). Babies are born hairless with their eyes closed. One mother mouse can produce over 100 babies a year.

Sunday, December 21, 2008

Goose: Amazing migratory birds

  • The first bird domesticated by man was the goose.
  • The original and classic foie gras is made from goose liver.
  • Geese are entirely herbivorous, consuming plant material exclusively.
  • Migratory geese flight range 2 – 3 thousand miles.
  • Resident geese flight range: 100 –200 miles to find food, water, and safety.
  • Geese will find a new mate if mate dies or is killed.
  • The Geese eggs in a nest are called a "clutch", avegaring 5 per nest.
  • In the event the clutch is lost to a predator, the goose will lay a new clutch.
  • Baby geese are called "goslings".
  • Natural predators of geese are foxes, raccoons, owls and snapping turtles
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Superorder: Galloanserae
Order: Anseriformes
Family: Anatidae
Subfamily: Anserinae
Tribe: Anserini


The most familiar and widespread goose in North America, the Canada Goose, can be found all across the continent, from the tundra in Canada to the Gulf Coast. Many populations are resident in urban and suburban areas, and often come into conflict with people. In appearance, a “resident” Canada goose is identical to a migrant. The only differences between a resident and migrant are that the resident breeds in the United States and does not migrate. The “acid test” to determine residency is the presence of nests and goslings in the contiguous United States during the spring breeding season. In the wild, the birds can eat nearly all plant species and parts, including aquatic, but especially enjoy grasses, clovers, sedges, grain, and berries.
Generally the term foie gras is used for goose liver, although it is also used to refer to duck liver. Goose liver is considered superior by most people.

Mother goose lays 1 egg approximately 1_ days apart until full clutch is obtained. Mother goose waits until all eggs are laid before she begins to sit on nest to incubate eggs. Incubation time: 28 – 30 days. Undeveloped eggs (still fluid) will sink or float vertically with the wider portion of the egg pointing down. All geese eggs in a single clutch hatch on approximately the same day.

Monday, December 15, 2008

Spiders: amazing hunters and nature balancer

  • The sex organ on a male spider is located at the end of one of its legs.
  • Male spiders are usually smaller than female spiders.
  • Most spiders are very nearsighted.
  • Webs get dirty and torn, so lots of spiders make a new one every day.
  • Spiders have as many as 8 eyes, but some spiders have only 6 eyes and several spiders have fewer or even none.
  • Fear of spiders is called Arachnophobia.
  • Most spiders have fangs, through which venom is ejected.
  • Spiders are invertebrates, which means they don't have backbones.
  • Spiders are not insects. Insects have three body parts and six legs.
  • Spiders have eight legs and two body parts, the abdomen and the thorax.
  • Spiders have silk spinning glands called spinnerets, at the tip of their abdomen.
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae

Spiders are air-breathing chelicerate arthropods that have two body segments, eight legs, and no chewing mouth parts. About 40,000 species have been identified. In spiders' bodies the usual arthropod segments are fused into two tagmata, the cephalothorax and abdomen, joined by a small, cylindrical pedicel. These small creatures help plants reproduce by pollinating them. They also help recycle dead trees and animals back into the earth. They are also a vital source of food for birds, fish, and small mammals. Without invertebrates, like spiders and insects, many other living things would not survive.

The silk of a spider is mainly composed of a protein very similar to that used in insect silk. It is initially a liquid, and hardens not by exposure to air but as a result of being drawn out, which changes the internal structure of the protein. Most spiders have four pairs of eyes on the top-front area of the cephalothorax, arranged in patterns that vary from one family to another. The pair at the front are of the type called pigment-cup ocelli ("little eyes"), which in most arthropods are only capable of detecting the direction from which light is coming, using the shadow cast by the walls of the cup. However the main eyes at the front of spiders' heads are pigment-cup ocelli that are capable of forming images.

The largest spider is the South American tarantula, as big as a dinner plate and heavy as a stick of butter. The smallest is the Comb-footed spider, smaller than the head of a pin. The smallest, dwarf spiders of the subfamily Erigoninae, are less than 1 mm (about .05 inches) in body length. Cooked tarantula spiders are considered a delicacy in Cambodia, and by the Piaroa Indians of southern Venezuela – provided the highly irritant hairs, the spiders' main defense system, are removed first. Spider venoms may be a less polluting alternative to conventional pesticides as they are deadly to insects but the great majority are harmless to vertebrates. Australian funnel web spiders are a promising source as most of the world's insect pests have had no opportunity to develop any immunity to their venom, and funnel web spiders thrive in captivity and are easy to "milk". It may be possible to target specific pests by engineering genes for the production of spider toxins into viruses that infect species such as cotton bollworms. Possible medical uses for spider venoms are being investigated, for the treatment of cardiac arrhythmia, Alzheimer's disease, strokes, and erectile dysfunction.

Arachnophobia is a specific phobia, an abnormal fear of spiders or anything reminiscent of spiders, such as webs or spider-like shapes. It may be an exaggerated form of an instinctive response that helped early humans to survive, or perhaps a cultural phenomenon that is most common in predominantly European societies.

Monday, December 8, 2008

Armadillos: Great body structure for medical research

  • The scientific name of the nine banded armadillo is Dasypus novemcinctus. Dasypus is from the Greek word for rabbit, novem is from the Latin word for nine and cinctus is from the Latin word for a band.
  • The word armadillo is Spanish for "little armored one."
  • Armadillos spend about 80% of their lives sleeping.
  • Armadillos are not blind, but they do have poor eyesight.
  • Contrary to popular belief, the nine-banded armadillo can not roll itself into a ball to escape predators!! Only one of the twenty-odd varieties of armadillos — the three-banded armadillo (Tolypeutes tricinctus) — is able to roll up.
  • Nine-banded armadillos always give birth to four identical young — the only mammal known to do so.
  • Armadillos are used in leprosy research because their body temperatures are low enough for them to contract the most virulent form of the disease.
  • Armadillos like to swim, and they are very good at it.
  • Armadillo teeth have no enamel.
  • Like most insect eating mammals, armadillos have a very long, sticky tongue to slurp up bugs as quickly as possible.
  • Armadillos have a very low metabolic rate, which means they don’t produce much body heat.
  • One way that armadillos conserve energy is through reta mirabila (Latin for “miraculous net”) — a system of veins and arteries in their legs.
  • Baby armadillos have soft shells, like human fingernails.
  • In many parts of the world, including the United States, you might find armadillo meat on the menu.
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Superorder: Xenarthra
Order: Cingulata

Armadillos are small placental mammals, known for having a leathery armor shell. The other types are covered with too many bony plates to allow them to curl up. Other armadillos have to rely on their armored shells for defense while they scuttle away through thick, thorny brush or dig themselves a hole to hide in. They also do not have a very strong immune system, making them an ideal model for many types of medical research.

“Virgin births” Armadillos are a result of the female’s ability to delay implantation of the fertilized egg during times of stress. This reproductive tactic is one reason why the armadillos are so good at colonizing new areas (such as the United States). Armadillos have a strong dog paddle, and can even go quite a distance underwater, walking along the bottom of streams and ponds. They can hold their breath for four to six minutes at a time. When they need to cross larger bodies of water, they swim across. Because their heavy shell makes it hard for them to float, they gulp air into their intestines to make them more buoyant. The ability to cross streams and rivers has helped armadillos expand their home range. Armadillos also have very few teeth — just several peg-like molars. Since they primarily eat insects, they don’t have to do a lot of heavy chewing, making big, strong teeth a waste of energy to grow. They also are equipped with strong claws to tear open ant nests. Their cousins, the anteaters, have very similar tongues and claws.

Armadillos are not good at living in cold areas, because they can’t keep warm very well! Armadillos don’t have a lot of body fat, so they must forage for food on a daily basis. Just a few cold days in a row can be deadly to an armadillo. Despite this fact, armadillos are steadily moving north. Hot blood going out through arteries is cooled by cold blood coming in through veins, and vice versa. This means that not much heat actually goes out into the legs, keeping it in the body. This also means they will get frostbitten very easily, since they have no way to warm their extremities through blood flow. Marine mammals, like whales, use a similar net of veins and arteries to stop the loss of body heat through the fins.

Thursday, December 4, 2008

Crickets: cute body structure

  • The ears of a cricket are located on the front legs, just below the knee.
  • While crickets have wings, the majority of them do not fly.
  • Spiders, some wasps, ground beetles, birds, small rodents and lizards are cricket predators.
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Orthoptera
Suborder: Ensifera
Superfamily: Grylloidea
Family: Gryllidae

Crickets have long antennae and hind legs adapted for jumping; organs for hearing are located on their front legs. Solitary by day, crickets remain in crevices, under rocks, or in shallow burrows dug in the soil, emerging at night to feed on plants.
Crickets are omnivores and scavengers feeding on organic materials, as well as decaying plant material, fungi, and some seedling plants. Crickets also have been known to eat their own dead when there is no other source of food available. If left unchecked in houses, especially in large numbers, they will cause damage to clothing and other fabrics. They also have been known to feed on other insects, as in the smaller ones that live among ants.

Crickets do not rub their hind legs together to chirp. The left forewing of the male has a thick rib (a modified vein) which bears 50 to 300 ridges. The chirp (which only male crickets can do) is generated by raising their left forewing to a 45 degree angle and rubbing it against the upper hind edge of the right forewing, which has a thick scraper (Berenbaum 1995). This sound producing action is called "stridulation" and the song is species-specific. There are four types of cricket song: The calling song attracts females and repels other males, and is fairly loud. The courting song is used when a female cricket is near, and is a very quiet song. An aggressive song is triggered by chemoreceptors on the antennae that detect the near presence of another male cricket and a copulatory song is produced for a brief period after successful deposition of sperm on the female's eggs.

The Cricket wings are often too small to be of any use and lie useless across the back. Most get about by jumping from place to place, and through time, have developed legs
that are built for jumping at great heights when put in comparison to their size. Crickets vary in size from specie to specie, with most being in the range of ½” to 1”. One species that appears to clean up after ants in the ant’s own house is smaller than ¼’. The common house cricket is usually on the smaller end, most often not being much over the ½” range. As their name suggests, these are most commonly found around and inside houses.

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