National Animal of Bangladesh.

Distribution and Habitat:

In 1982, a sub-fossil right middle phalanx was found in a prehistoric midden near Kuruwita in Sri Lanka, which is dated to about 16,500 ybp and tentatively considered to be of a tiger. Tigers appear to have arrived in Sri Lanka during a pluvial period during which sea levels were depressed, evidently prior to the last glacial maximum about 20,000 years ago.In 1929, the British taxonomist Pocock assumed that tigers arrived in southern India too late to colonize Sri Lanka, which earlier had been connected to India by a land bridge.

In the Indian subcontinent, tigers inhabit tropical moist evergreen forests, tropical dry forests, tropical and subtropical moist deciduous forests, mangroves, subtropical and temperate upland forests, and alluvial grasslands. Latter tiger habitat once covered a huge swath of grassland and riverine and moist semi-deciduous forests along the major river system of the Gangetic and Brahmaputra plains, but has now been largely converted to agricultural land or severely degraded. Today, the best examples of this habitat type are limited to a few blocks at the base of the outer foothills of the Himalayas including the Tiger Conservation Units (TCUs) Rajaji-Corbett, Bardia-Banke, and the transboundary TCUs Chitwan-Parsa-Valmiki, Dudhwa-Kailali and Sukla Phanta-Kishanpur.

Bangladesh:

Tigers in Bangladesh are now relegated to the forests of the Sundarbans and the Chittagong Hill Tracts. The Chittagong forest is contiguous with tiger habitat in India and Myanmar, but the tiger population is of unknown status.

As of 2004, population estimates in Bangladesh ranged from 200 to 419, mostly in the Sunderbans.This region is the only mangrove habitat in this bioregion, where tigers survive, swimming between islands in the delta to hunt prey .Bangladesh's Forest Department is raising mangrove plantations supplying forage for spotted deer. Since 2001, afforestation has continued on a small scale in newly accreted lands and islands of the Sundarbans From October 2005 to January 2007, the first camera-trap survey was conducted across six sites in the Bangladesh Sundarbans to estimate tiger population density. The average of these six sites provided an estimate of 3.7 tigers per 100 km² (39 sq mi). Since the Bangladesh Sundarbans is an area of 5,770 km² (2,230 sq mi) it was inferred that the total tiger population comprised approximately 200 individuals In another study, home ranges of adult female tigers were recorded comprising between 12 and 14 km² (4.6 and 5.4 sq mi).which would indicate an approximate carrying capacity of 150 adult females. The small home range of adult female tigers (and consequent high density of tigers) in this habitat type relative to other areas may be related to both the high density of prey and the small size of the Sundarbans tigers.

Since 2007 tiger monitoring surveys have been carried out every year by WildTeam in the Bangladesh Sundarbans to monitor changes in the Bangladesh tiger population and assess the effectiveness of conservation actions. This survey measures changes in the frequency of tiger track sets along the sides of tidal waterways as an index of relative tiger abundance across the Sundarbans landscape.

The population size for the Bangladesh Sundarbans was estimated as 100–150 adult females or 335–500 tigers overall. Female home ranges, recorded using Global Positioning System collars, were some of the smallest recorded for tigers, indicating that the Bangladesh Sundarbans could have one of the highest densities and largest populations of tigers anywhere in the world. They are isolated from the next tiger population by a distance of up to 300 km (190 mi). Information is lacking on many aspects of Sundarbans tiger ecology, including relative abundance, population status, spatial dynamics, habitat selection, life history characteristics, taxonomy, genetics, and disease. There is also no monitoring program in place to track changes in the tiger population over time, and therefore no way of measuring the response of the population to conservation activities or threats. Most studies have focused on the tiger-human conflict in the area, but two studies in the Sundarbans East Wildlife sanctuary documented habitat-use patterns of tigers, and abundances of tiger prey, and another study investigated tiger parasite load. Some major threats to tigers have been identified. The tigers living in the Sundarbans are threatened by habitat destruction, prey depletion, highly aggressive and rampant intraspecific competition, tiger-human conflict, and direct tiger loss.

 To Be Continue

National Animal of Bangladesh.

Records:

Two tigers shot in Kumaon and near Oude at the end of the 19th century allegedly measured more than 12 ft. But at the time, sportsmen had not yet adopted a standard system of measurement; some would measure between pegs while others would round the curves.

In the beginning of the 20th century, a male Bengal tiger was shot in central India with a head and body length of 221 cm between pegs, a chest girth of 150 cm a shoulder height of 109 cm and a tail length of 81 cm (32 in), which was perhaps bitten off by a rival male. This specimen could not be weighed, but it was calculated to weigh no less than 272 kg

A heavy male weighing 570 lb (260 kg) was shot in northern India in the 1930s. However, the heaviest known tiger was a huge male killed in 1967 that weighed 388.7 kg (857 lb) and measured 322 cm (127 in) in total length between pegs, and 338 cm (133 in) over curves. This specimen is on exhibition in the Mammals Hall of the Smithsonian Institution.In 1980 and 1984, scientists captured and tagged two male tigers in Chitwan National Park that weighed more than 270 kg

Body weight:

Bengal tigers may weigh up to 325 kg and reach a head and body length of 320 cm .Several scientists indicated that adult male Bengal tigers from Nepal, Bhutan, and Assam, Uttarakhand and West Bengal in northern India  consistently attain more than 227 kg of body weight. Seven adult males captured in Chitwan National Park in the early 1970s had an average weight of 235 kg  ranging from 200 to 261 kg , and that of the females was 140 kg  ranging from 116 to 164 kg . Males from northern India are nearly as large as Siberian tigers with a greatest length of skull of 332 to 376 mm .

Three males captured in Nagarahole National Park in India had a head and body length which ranged from 189 to 204 cm , with a tail length of 100 to 107 cm , while a single female measured 161 cm , with a tail length of 87 cm . Adult male Bengal tigers in Nagarahole National Park ranged from 230 to 260 kg  in weight. An adult male tiger named "T-03" that was killed by a large male gaur, weighed 257 kg . Another male, "T-04" who was estimated to be between 3 and 4 years old weighed 250 kg and had a head and body length of 290 cm . "T-01" was an old male that weighed 231 kg . A collared male weighed 240 kg despite the fact that both his canine teeth were broken. The tigresses in the area were equally massive. One female, named "Sundari" weighed 150 kg . Another female, named "T-02", had a head and body length of 250 cm  and weighed 177 kg .

In comparison, a weight range of 150 to 189 kg  is considered fairly average for a male African lion in the Serengeti.

To Be Continue

National Animal of Bangladesh

The Bengal tiger, also called the royal Bengal tiger (Panthera tigris tigris), is the most numerous tiger subspecies. It is the national animal of both India and Bangladesh.^[2] By 2011, the total population was estimated at fewer than 2,500 individuals with a decreasing trend. None of the Tiger Conservation Landscapes within the Bengal tiger's range is considered large enough to support an effective population size of 250 adult individuals. Since 2010, it has been classified as endangered by the IUCN.^[1]

As of 2010, Bengal tiger populations in India have been estimated at 1700-1900. As of 2014, they had reputedly increased to an estimated 2,226 individuals,^[4] but the method used in the census may not be accurate. Bengal tigers number around 440 in Bangladesh and 163–253 in Nepal. There were previously 67–81 individuals in Bhutan. However, the latest census estimated that 103 wild Bengal tigers are living in the country.

Characteristics:

The Bengal tiger's coat is yellow to light orange, with stripes ranging from dark brown to black; the belly and the interior parts of the limbs are white, and the tail is orange with black rings. The white tiger is a recessive mutant of the Bengal tiger, which is reported in the wild from time to time in Assam, Bengal, Bihar and especially from the former State of Rewa. However, it is not to be mistaken as an occurrence of albinism. In fact, there is only one fully authenticated case of a true albino tiger, and none of black tigers, with the possible exception of one dead specimen examined in Chittagong in 1846.

Male Bengal tigers have an average total length of 270 to 310 cm (110 to 120 in) including the tail, while females measure 240 to 265 cm (94 to 104 in) on average. The tail is typically 85 to 110 cm (33 to 43 in) long, and on average, tigers are 90 to 110 cm (35 to 43 in) in height at the shoulders.^]The weight of males ranges from 180 to 258 kg (397 to 569 lb), while that of the females ranges from 100 to 160 kg (220 to 350 lb). The smallest recorded weights for Bengal tigers are from the Bangladesh Sundarbans, where adult females are 75 to 80 kg (165 to 176 lb). Bengal tigers have exceptionally stout teeth, and the canines are the longest among all living felids; measuring from 7.5 to 10 cm (3.0 to 3.9 in) in length. 

To Be Continue

Natural Beauties Of Bangladesh

National Flower Of Bangladesh .It Is very Beautiful Flower in The World.

Blog about

A blog (a truncation of the expression weblog)^[1] is a discussion or informational site published on the World Wide Web consisting of discrete entries ("posts") typically displayed in reverse chronological order (the most recent post appears first). Until 2009, blogs were usually the work of a single individual^{[citation needed]}, occasionally of a small group, and often covered a single subject. More recently "multi-author blogs" (MABs) have developed, with posts written by large numbers of authors and professionally edited. MABs from newspapers, other media outlets, universities, think tanks, advocacy groups, and similar institutions account for an increasing quantity of blog traffic. The rise of Twitter and other "microblogging" systems helps integrate MABs and single-author blogs into societal newstreams. Blog can also be used as a verb, meaning to maintain or add content to a blog.
The emergence and growth of blogs in the late 1990s coincided with the advent of web publishing tools that facilitated the posting of content by non-technical users. (Previously, a knowledge of such technologies as HTML and FTP had been required to publish content on the Web.)
A majority are interactive, allowing visitors to leave comments and even message each other via GUI widgets on the blogs, and it is this interactivity that distinguishes them from other static websites.^[2] In that sense, blogging can be seen as a form of social networking service. Indeed, bloggers do not only produce content to post on their blogs, but also build social relations with their readers and other bloggers.^[3] However, there are high-readership blogs which do not allow comments, such as Daring Fireball.
Many blogs provide commentary on a particular subject; others function as more personal online diaries; others function more as online brand advertising of a particular individual or company. A typical blog combines text, images, and links to other blogs, Web pages, and other media related to its topic. The ability of readers to leave comments in an interactive format is an important contribution to the popularity of many blogs. Most blogs are primarily textual, although some focus on art (art blogs), photographs (photoblogs), videos (video blogs or "vlogs"), music (MP3 blogs), and audio (podcasts). Microblogging is another type of blogging, featuring very short posts. In education, blogs can be used as instructional resources. These blogs are referred to as edublogs.
On 16 February 2011, there were over 156 million public blogs in existence. On 20 February 2014, there were around 172 million Tumblr^[4] and 75.8 million WordPress^[5] blogs in existence worldwide. According to critics and other bloggers, Blogger is the most popular blogging service used today. However, Blogger does not offer public statistics.^[6][7] Technorati has 1.3 million blogs as of February 22, 2014.^[8]