Wednesday, April 22, 2009

DEERS


Deer are the ruminant mammals forming the family Cervidae . A number of broadly similar animals from related families within the order Artiodactyla (even-toed ungulates) are often also called deer. Male deer of all species (except the Chinese water deer) grow and shed new antlers each year – in this they differ from permanently horned animals such as antelope – these are in the same order as deer and may bear a superficial resemblance. The Musk deer of Asia and Water Chevrotain (or Mouse Deer) of tropical African and Asian forests are not true deer and form their own families, Moschidae and Tragulidae, respectively. All other animals in Africa resembling deer are antelope.

Terminology

The word "deer" was originally quite broad in meaning, but became more specific over time. In Middle English der (O.E. dēor) meant a wild animal of any kind (as opposed to cattle, which then meant any domestic livestock).This general sense gave way to the modern sense by the end of the Middle English period, around 1500. Cognates of English "deer" in several other languages still have the general sense of "animal – for example German Tier, Dutch dier, and Scandinavian djur, dyr, dýr. "Deer" is the same in the plural as in the singular.

For most deer the male is called a buck and the female is a doe, but terminology varies according to the size of the species. For many medium-sized deer the male is a stag and the female a hind, while for many larger deer the same words are used as for cattle: bull and cow. Terms for young deer vary similarly, with that of most being called a fawn and that of the larger species calf; young of the smallest kinds may be a kid. A group of deer of any kind is a herd. Usage of all these terms may also vary according to dialect. The adjective of relation pertaining to deer is cervine; like the family name "Cervidae" this is from Latin cervus, "deer".

The word hart is an old alternative word for "stag" (from Old English heorot, "deer" – compare with modern Dutch hert, also "deer"). It is not now widely used, but Shakespeare makes several references (for example in Twelfth Night), punning on the sound-alike "hart" and "heart". "The White Hart" and "The Red Hart" remain common English pub names, and the county Hertfordshire is thought to be named after a place where deer forded a watercourse. Whinfell Forest once contained a landmark tree called Harthorn.


Habitat

Deer are widely distributed, and hunted, with indigenous representatives in all continents except Antarctica and Australia, though Africa has only one native species, the Red Deer, confined to the Atlas Mountains in the northwest of the continent.

Deer live in a variety of biomes ranging from tundra to the tropical rainforest. While often associated with forests, many deer are ecotone species that live in transitional areas between forests and thickets (for cover) and prairie and savanna (open space). The majority of large deer species inhabit temperate mixed deciduous forest, mountain mixed coniferous forest, tropical seasonal/dry forest, and savanna habitats around the world. Clearing open areas within forests to some extent may actually benefit deer populations by exposing the understory and allowing the types of grasses, weeds, and herbs to grow that deer like to eat. Additionally, access to adjacent croplands may also benefit deer. However, adequate forest or brush cover must still be provided for populations to grow and thrive.

Small species of brocket deer and pudús of Central and South America, and muntjacs of Asia generally occupy dense forests and are less often seen in open spaces, with the possible exception of the Indian Muntjac. There are also several species of deer that are highly specialized, and live almost exclusively in mountains, grasslands, swamps, and "wet" savannas, or riparian corridors surrounded by deserts. Some deer have a circumpolar distribution in both North America and Eurasia. Examples include the caribou that live in Arctic tundra and taiga (boreal forests) and moose that inhabit taiga and adjacent areas. Huemul Deer (taruca and Chilean Huemul) of South America's Andes fill an ecological niche of the ibex or Wild Goat, with the fawns behaving more like goat kids.

The highest concentration of large deer species in temperate North America lies in the Canadian Rocky Mountain and Columbia Mountain Regions between Alberta and British Columbia where all five North American deer species (White-tailed deer, Mule deer, Caribou, Elk, and Moose) can be found. This region has several clusters of national parks including Mount Revelstoke National Park, Glacier National Park (Canada), Yoho National Park, and Kootenay National Park on the British Columbia side, and Banff National Park, Jasper National Park, and Glacier National Park (U.S.) on the Alberta and Montana sides. Mountain slope habitats vary from moist coniferous/mixed forested habitats to dry subalpine/pine forests with alpine meadows higher up. The foothills and river valleys between the mountain ranges provide a mosaic of cropland and deciduous parklands. The rare woodland caribou have the most restricted range living at higher altitudes in the subalpine meadows and alpine tundra areas of some of the mountain ranges. Elk and Mule Deer both migrate between the alpine meadows and lower coniferous forests and tend to be most common in this region. Elk also inhabit river valley bottomlands, which they share with White-tailed deer. The White-tailed deer have recently expanded their range within the foothills and river valley bottoms of the Canadian Rockies owing to conversion of land to cropland and the clearing of coniferous forests allowing more deciduous vegetation to grow up the mountain slopes. They also live in the aspen parklands north of Calgary and Edmonton, where they share habitat with the moose. The adjacent Great Plains grassland habitats are left to herds of Elk, American Bison, and pronghorn antelope.

The Eurasian Continent (including the Indian Subcontinent) boasts the most species of deer in the world, with most species being found in Asia. Europe, in comparison, has lower diversity in plant and animal species. However, many national parks and protected reserves in Europe do have populations of Red Deer, Roe Deer, and Fallow Deer. These species have long been associated with the continent of Europe, but also inhabit Asia Minor, the Caucasus Mountains, and Northwestern Iran. "European" Fallow Deer historically lived over much of Europe during the Ice Ages, but afterwards became restricted primarily to the Anatolian Peninsula, in present-day Turkey. Present-day Fallow deer populations in Europe are a result of historic man-made introductions of this species first to the Mediterranean regions of Europe, then eventually to the rest of Europe. They were initially park animals that later escaped and reestablished themselves in the wild. Historically, Europe's deer species shared their deciduous forest habitat with other herbivores such as the extinct tarpan (forest horse), extinct aurochs (forest ox), and the endangered wisent (European bison). Good places to see deer in Europe include the Scottish Highlands, the Austrian Alps, and the wetlands between Austria, Hungary, and Czech Republic. Some fine National Parks include Doñana National Park in Spain, the Veluwe in the Netherlands, the Ardennes in Belgium, and Białowieża National Park of Poland. Spain, Eastern Europe, and the Caucasus Mountains still have virgin forest areas that are not only home to sizable deer populations but also for other animals that were once abundant such as the wisent, Eurasian Lynx, Spanish lynx, wolves, and Brown Bears.

The highest concentration of large deer species in temperate Asia occurs in the mixed deciduous forests, mountain coniferous forests, and taiga bordering North Korea, Manchuria (Northeastern China), and the Ussuri Region (Russia). These are among some of the richest deciduous and coniferous forests in the world where one can find Siberian Roe Deer, Sika Deer, Elk, and Moose. Asian Caribou occupy the northern fringes of this region along the Sino-Russian border.

Deer such as the Sika Deer, Thorold's deer, Central Asian Red Deer, and Elk have historically been farmed for their antlers by Han Chinese, Turkic peoples, Tungusic peoples, Mongolians, and Koreans. Like the Sami people of Finland and Scandinavia, the Tungusic peoples, Mongolians, and Turkic peoples of Southern Siberia, Northern Mongolia, and the Ussuri Region have also taken to raising semi-domesticated herds of Asian Caribou.

The highest concentration of large deer species in the tropics occurs in Southern Asia in Northern India's Indo-Gangetic Plain Region and Nepal's Terai Region. These fertile plains consist of tropical seasonal moist deciduous, dry deciduous forests, and both dry and wet savannas that are home to Chital, Hog Deer, Barasingha, Indian Sambar, and Indian Muntjac. Grazing species such as the endangered Barasingha and very common Chital are gregarious and live in large herds. Indian Sambar can be gregarious but are usually solitary or live in smaller herds. Hog Deer are solitary and have lower densities than Indian Muntjac. Deer can be seen in several national parks in India, Nepal, and Sri Lanka of which Kanha National Park, Dudhwa National Park, and Chitwan National Park are most famous. Sri Lanka's Wilpattu National Park and Yala National Park have large herds of Indian Sambar and Chital. The Indian sambar are more gregarious in Sri Lanka than other parts of their range and tend to form larger herds than elsewhere.

The Chao Praya River Valley of Thailand was once primarily tropical seasonal moist deciduous forest and wet savanna that hosted populations of Hog Deer, the now-extinct Schomburgk's Deer, the Eld's Deer, Indian Sambar, and Indian Muntjac. Both the Hog Deer and Eld's Deer are rare, whereas Indian Sambar and Indian Muntjac thrive in protected national parks such as Khao Yai.

Many of these South Asian and Southeast Asian deer species also share their habitat with various herbivores such as Asian Elephants, various Asian rhinoceros species, various antelope species (such as nilgai, Four-horned Antelope, blackbuck, and Indian gazelle in India), and wild oxen (such as Wild Asian Water Buffalo, gaur, banteng, and kouprey). How different herbivores can survive together in a given area is each species have different food preferences, although there may be some overlap.

Australia has six introduced species of deer that have established sustainable wild populations from acclimatisation society releases in the 19th Century. These are Fallow Deer, Red Deer, Sambar Deer, Hog Deer, Rusa deer, and Chital. Red Deer introduced into New Zealand in 1851 from English and Scottish stock were domesticated in deer farms by the late 1960s and are common farm animals there now. Seven other species of deer were introduced into New Zealand but none are as widespread as Red Deer.

Biology

Extant deer range in size from the 10 kg (22 lb) Northern Pudu to the 450 kg (990 lb) Moose. They generally have lithe, compact bodies and long, powerful legs suited for rugged woodland terrain. Deer are also excellent jumpers and swimmers. Deer are ruminants, or cud-chewers, and have a four-chambered stomach. The teeth of deer are adapted to feeding on vegetation, and like other ruminants, they lack upper incisors, instead having a tough pad at the front of their upper jaw. The Chinese water deer, Tufted deer and muntjac have enlarged upper canine teeth forming sharp tusks, while other species often lack upper canines altogether. The cheek teeth of deer have crescent ridges of enamel, which enable them to grind a wide variety of vegetation.
Nearly all deer have a facial gland in front of each eye. The gland contains a strongly scented pheromone, used to mark its home range. Bucks of a wide range of species open these glands wide when angry or excited. All deer have a liver without a gallbladder. Deer also have a Tapetum lucidum which gives them sufficiently good night vision.

A doe generally has one or two fawns at a time (triplets, while not unknown, are uncommon). The gestation period is anywhere up to ten months for the European Roe Deer. Most fawns are born with their fur covered with white spots, though in many species they lose their spots once they get older. In the first twenty minutes of a fawn's life, the fawn begins to take its first steps. Its mother licks it clean until it is almost free of scent, so predators will not find it. Its mother leaves often, and the fawn does not like to be left behind. Sometimes its mother must gently push it down with her foot.The fawn stays hidden in the grass for one week until it is strong enough to walk with its mother. The fawn and its mother stay together for about one year. A male usually never sees his mother again, but females sometimes come back with their own fawns and form small herds.
 
Fawn

Deer are selective feeders. They are usually browsers, and primarily feed on leaves. They have small, unspecialized stomachs by ruminant standards, and high nutrition requirements. Rather than attempt to digest vast quantities of low-grade, fibrous food as, for example, sheep and cattle do, deer select easily digestible shoots, young leaves, fresh grasses, soft twigs, fruit, fungi, and lichens.a

Monday, March 23, 2009

PEAFOWL (PEACOCK & PEAHEN)

http://www.edukshun.info/wp-content/uploads/2008/04/peacock.jpg

The term peafowl can refer to the two species of bird in the genus Pavo of the pheasant family, Phasianidae. The African Congo Peafowl is placed in its own genus Afropavo and is not dealt with here. Peafowl are best known for the male's extravagant tail feathers, which it displays as part of courtship. The male is called a peacock, the female a peahen, though it is common to hear the female also referred to as a "peacock." The female peafowl is brown or toned grey and pink

The two species are:

  • Indian Peafowl, Pavo cristatus (Asiatic)
  • Green Peafowl, Pavo muticus (Asiatic)

The Indian Peafowl is a resident breeder in the Indian subcontinent. The peacock is designated as the national bird of India.

The Green Peafowl breeds from Burma east to Java. The IUCN lists the Green Peafowl as vulnerable to extinction due to hunting and a reduction in extent and quality of habitat.

The White Peafowl breeds from India and are the rarest and feathers can reach a sale price of $500 per feather.

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Galliformes
Family: Pavoninidae
Genus: Rheinardia

subdivision_ranks = Species

Species

Pavo antiquus
Pavo annamensis
Pavo spicifer
Pavo javanensis
Pavo imperator
Pavo cristatus


Behavior




A rear view of an Indian Blue Peacock's tail feathers

The peafowl are forest birds that nest on the ground. The Pavo peafowl are terrestrial feeders but roost in trees.

Both species of Peafowl are believed to be polygamous. However, it has been suggested that "females" entering a male Green Peafowl's territory are really his own juvenile or subadult young (K. B. Woods in litt. 2000) and that Green Peafowl are really monogamous in the wild. Those who subscribe to this notion cite the similarities between the sexes.

The male peacock flares out its feathers when it is trying to get the female's attention.

During mating season they will often emit a very loud high pitched cry.

Diet

Peafowl are omnivorous and eat ticks, termites, ants, locusts, mice, plant parts, flower petals, seed heads, scorpions and other arthropods, reptiles, and amphibians.

In common with other members of the Galliformes, males of most species and females of all but two species, possess powerful, wickedly sharp, metatarsal spurs or "kicking thorns" used primarily to protect themselves against predators and to a lesser extent during intraspecific fights.

Habitat

Asiatic peafowl like the Indian Blue Peafowl, and especially the Green Peafowl, occupy a similar niche as the roadrunners, Secretary Bird, and seriemas. All of these birds hunt for small animals including arthropods on the ground and tall grass and minnows in shallow streams.

Because of human encroachment into their natural territories, peafowl and humans have come into increasing contact. Because of their natural beauty some are reluctant to classify the birds as pests but their presence can be disturbing, especially given their tendency to eat indiscriminately of garden boundaries and the male's powerful vocal crow (louder than a rooster's crow).

Gallery


Sunday, March 22, 2009

PARROTS

Parrots




Congo African Grey Parrot(Psittacus erithacus erithacus)
Congo African Grey Parrot
(Psittacus erithacus erithacus)




Scientific classification



Kingdom: Animalia
Phylum: Chordata
Class: Aves
Infraclass: Neognathae
Order: Psittaciformes
Wagler, 1830




Family








  • Nestoridae
  • Cacatuidae (cockatoos)
  • Psittacidae (true parrots)




Blue-and-yellow Macaw eating a walnut held by a foot

Parrots, also known as psittacines (pronounced /ˈsɪtəsaɪnz/), are birds of the roughly 372 species in 86 genera that make up the order Psittaciformes, found in most warm and tropical regions. The order is subdivded in three families: the Psittacidae (true parrots), the CacatuidaeNestoridae. Parrots have a pan-tropical distribution with several species inhabiting the temperate Southern Hemisphere as well. The greatest diversity of parrots is found in South America and Australasia. (cockatoos) and the

Characteristic features of parrots include a strong curved bill, an upright stance, strong legs, and clawed zygodactyl feet. Most parrots are predominantly green, with other bright colors, and some species are multi-colored. Cockatoo species range from mostly white to mostly black, and have a mobile crest of feathers on the top of their heads. Most parrots are monomorphic or minimally sexually dimorphic. Extant species range in size from the Buff-faced Pygmy-parrot, at under 10 g (0.35 oz.) in weight and 8 cm (3.2 inches) in length, to the Hyacinth Macaw, at 1.0 meter (3.3 feet) in length, and the Kakapo, at 4.0 kg (8.8 lbs) in weight. They are the most variably sized bird order in terms of length.

The most important components of most parrots' diets are seeds, nuts, fruit, buds and other plant material, and a few species also eat insects and small animals, and the lories and lorikeets are specialised to feed on nectar from flowers, and soft fruits. Almost all parrots nest in tree holes (or nestboxes in captivity), and lay white eggs from which emerge altricial (helpless) young.

Parrots, along with crows, jays and magpies, are some of the most intelligent birds, and the ability of some parrot species to imitate human voices enhances their popularity as pets. Trapping of wild parrots for the pet trade, as well as other hunting, habitat loss and competition from invasive species, have diminished wild populations, and parrots have been subjected to more exploitation than any other group of birds. Recent conservation measures to conserve the habitats of some of the high-profile charismatic parrot species has also protected many of the less charismatic species living in the ecosystem.

TYPES OF PARROTS
Some types of Parrots are :

Umbrella Cockatoos
Umbrella Cockatoos
Congo African Greys
Congo African Greys
Tucuman Amazon
Tucuman Amazon
Timneh African Greys
Timneh African Greys
Greenwing Macaws
Greenwing Macaws
Ruby Macaws
Ruby Macaws
Lesser Sulpher Crested Cockatoos
Lesser Sulpher Crested Cockatoos
Blue Front Amazon
Blue Front Amazon
Blue and Gold Macaws
Blue and Gold Macaws
Eclectus Parrots
Eclectus Parrots
Hahns Macaws
Hahns Macaws
Noble Macaw
Noble Macaw
Hahns/Noble Macaw
Hahns/Noble Macaw
Illiger Macaws
Illiger Macaws
Military Macaws
Military Macaws

Tuesday, March 17, 2009

Wild Animals

Animal Features

Photo: Woolly bear caterpillar

Woolly Bear Caterpillars Self-Medicate

Some caterpillars munch on drug-laced leaves to rid themselves of crippling parasites, a new study finds.


Photo: Tiger cub running

All About Big Cats

Lions and tigers and leopards, oh my. Learn about the felines known for their speed, sound, and predatory nature.


Photo: Clownfish

Under the Sea

Watch a selection of some of our favorite underwater photos submitted to My Shot by National Geographic readers.


Photo: Harlequin frog

Wildlife Filmmaker

Create your own nature films and mash-ups online using archive footage, sounds, and musical scores.



http://www.a1imaging.com/images/calendar_theme/wild_animals.gif






Fish

http://www.heartofjunction.com/clientimages/23987/fish-banner-web.gif

Types of Fish

Fish are aquatic creatures found throughout the globe. There are about 28,000 species of fish. Read on to know more about types of fish.
Types of Fish
Fish are the oldest vertebrates of the world. The first fish is supposed to be found about 500 million years ago. These are the aquatic vertebrates, typically ectothermic (cold-blooded). Their body is covered with scales and provided with two sets of paired fins and many unpaired fins. Most fish have a bony skeleton, except rays and sharks have cartilaginous skeleton. Fish breathe using the gills, which perform an exchange of gases between the fish’s blood and water. Most fish feed on small plants, while some fish such as shark feed on other fish.

There is a huge variety of fish, differing in size, shape and color. Their sizes highly range from 8 mm long stout infant fish to 16 m whale shark. There are over 28,000 known species of fish found throughout the world. Out of them, almost 27,000 species include bony fish. Remaining 970 species include rays, sharks and chimeras and 108 lampreys and hag fishes. Fish are found in all types of water bodies all over the globe. Fish can be kept in an aquarium as the pets or used to prepare wonderful recipes.