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FAUNA AND

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Originally appearing in Volume V02, Page 949 of the 1911 Encyclopedia Britannica.
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FAUNA AND  See also:FLORA] See also:highlands . In summer the See also:sun has See also:great See also:power, and the temperature reaches oo° in the shade, with hot winds blowing from the interior . The See also:weather on the whole is remarkably dry . At See also:Adelaide there are on an See also:average 120 See also:rainy days per annum, with a mean rainfall of 2o•88 in . The See also:country is naturally very healthful, as See also:evidence of which may be mentioned that no great epidemic has ever visited the See also:state . Western See also:Australia has practically only two seasons, the See also:winter or wet See also:season, which commences in See also:April and ends in See also:October, and Western the summer or dry season, which comprises the See also:remainder Australia. of the See also:year . During the wet season frequent and heavy rains fall, and thunderstorms, with See also:sharp showers, occur in the summer, especially on the See also:north-See also:west See also:coast, which is some-times visited by hurricanes of great violence . In the See also:southern and See also:early-settled parts of the state the mean temperature is about 64°, but in the more See also:northern portions the See also:heat is excessive, though the dryness of the See also:atmosphere makes it preferable to moist tropical climates . The average rainfall at See also:Perth is 33 in. per annum . The See also:climate of the Northern Territory is extremely hot, except on the elevated tablelands; altogether, the temperature of this See also:part of the See also:continent is very similar to that of northern See also:Queensland, and the climate is not favourable to Europeans . The rainfall in the extreme north, especially in See also:January and See also:February, is very heavy, and the See also:annual average along the coast is about 63 in . The whole of the See also:peninsula north of 15° S. has a rainfall considerably exceeding 4o in .

This region is backed by a See also:

belt of about See also:loo m. wide, in which the rainfall is from 30 to 40 in., from which inwards the rainfall gradually declines until between Central See also:Mount See also:Stuart and See also:Macdonnell ranges it falls to between 5 and to in . See also:Fauna and Flora.—The origin of the fauna and flora of Australia has attracted considerable See also:attention . Much accumulated evidence, biological and See also:geological, has pointed to a southern See also:extension of See also:India, an eastern extension of See also:South See also:Africa, and a western extension of Australia into the See also:Indian Ocean . The See also:comparative richness of proteaceous See also:plants in Western Australia and South Africa first suggested a See also:common source for these See also:primitive types . Dr H . O . See also:Forbes See also:drew attention to a certain community amongst birds and other vertebrates, invertebrates, and amongst plants, on all the lands stretching towards the south See also:pole . A theory 'was therefore propounded that these known types were all derived from a continent which has been named Antarctica . The supposed continent extended across the south pole, practically joining Australia and South See also:America . Just as we have evidence of a former mild climate in the See also:arctic regions, so a similar mild climate has been postulated for Antarctica . See also:Modern naturalists consider that many of the problems of Australia's remarkable fauna and flora can be best explained by the following See also:hypothesis:—The region now covered by the See also:antarctic See also:ice-cap was in early See also:Tertiary times favoured by a mild climate; here See also:lay an antarctic continent or See also:archipelago . From an See also:area corresponding to what is now South America there entered a fauna and flora, which, after undergoing modification, passed by way of See also:Tasmania to Australia .

These immigrants then See also:

developed, with some exceptions, into the See also:present Australian flora and fauna . This theory has advanced from the position of a disparaged See also:heresy to See also:acceptance by leading thinkers . The See also:discovery as fossil, in South America, of primitive or ancestral forms of marsupials has given it much support . One of these, Prothylacinus, is regarded as the forerunner of the marsupial See also:wolf of Tasmania . An interesting See also:link between divergent marsupial families, still living in See also:Ecuador, the Coenolestes, is another discovery of See also:recent years . On the Australian See also:side the fact that Tasmania is richest in marsupial types indicates the See also:gate by which they entered . It is not to be supposed that this antarctic See also:element, to which See also:Professor See also:Tate has applied the name Euronotian, entered a See also:desert barren of all See also:life . Previous to its arrival Australia doubtless possessed considerable vegetation and a scanty fauna, chiefly invertebrate . At a comparatively recent date Australia received its third and newest constituent . The islands of Torres Strait have been shown to be the denuded remnant of a former extension of Cape See also:York peninsula in North Queensland . Previous to the existence of the strait, and across its site, there poured into Australia a See also:wealth of Papuan forms . Along the Pacific slope of the Queensland See also:Cordillera these found in See also:soil and climate a congenial See also:home .

Among the plants the See also:

wild See also:banana, See also:pepper, See also:orange and See also:mangosteen, See also:rhododendron, epiphytic See also:orchids and the See also:palm; among mammals the bats and947 rats; among birds the See also:cassowary and See also:rifle birds; and among See also:reptiles the See also:crocodile and See also:tree See also:snakes, characterize this element . The numerous facts, geological, See also:geographical and biological, which when linked together lend great support to this theory, have been well worked out in Australia by Mr See also:Charles Hedley of the Australian Museum, See also:Sydney . The See also:zoology of Australia and Tasmania presents a very conspicuous point of difference from that of other regions of the globe, in the prevalence of non-placental See also:mammalia . The vast Fauna. See also:majority of the mammalia are provided with an See also:organ in the uterus, by which, before the See also:birth of their See also:young, a vascular connexion is maintained between the embryo and the See also:parent See also:animal . There are two orders, the See also:Marsupialia and the See also:Monotremata, which do not possess this organ; both these are found in Australia, to which region indeed they are not absolutely confined . The geographical limits of the marsupials are very interesting . The opossums of America are marsupials, though not showing anomalies as great as kangaroos and bandicoots (in their feet), and Myrmecobius (in the number of See also:teeth) . Except the opossums, no single living marsupial is known outside the Australian zoological region . The forms of life characteristic of India and the See also:Malay peninsula come down to the See also:island of See also:Bali . Bali is separated from See also:Lombok by a strait not more than 15 M. wide . Yet this narrow belt of See also:water is the boundary See also:line between the Australasian and the Indian regions . The zoological boundary passing through the Bali Strait is called " See also:Wallace's line," after the eminent naturalist who was its discoverer .

He showed that not only as regards beasts, but also as regards birds, these regions are thus sharply limited . Australia, he pointed out, has no woodpeckers and no pheasants, which are widely-spread Indian birds . Instead of these it has See also:

mound-making turkeys, See also:honey-suckers, cockatoos and See also:brush-tongued lories, all of which are found nowhere else in the See also:world . The marsupials constitute two-thirds of all the Australian See also:species of mammals . It is the well-known peculiarity of this See also:order that the See also:female has a pouch or See also:fold of skin upon her See also:abdomen, in which she can See also:place the young for suckling within reach of her teats . The See also:opossum of America is the only species out of See also:Australasia which is thus provided . Australia is inhabited by at least 1 Io different species of marsupials, which is about two-thirds of the known species; these have been arranged in five tribes, according to the See also:food they eat, viz., the grass-eaters (kangaroos), the See also:root-eaters (wombats), the See also:insect-eaters (bandicoots), the flesh-eaters (native See also:cats and rats), and the See also:fruit-eaters (phalangers) . The See also:kangaroo (Macropus) lives in droves in the open grassy plains . Several smaller forms of the same See also:general See also:appearance are known as wallabies, and are common everywhere . The kangaroo and most of its congeners show an extraordinary disproportion of the See also:hind limbs to the fore part of the See also:body . The See also:rock wallabies again have See also:short tarsi of the hind legs, with a See also:long pliable tail for climbing, like that of the tree kangaroo of New See also:Guinea, or that of the See also:jerboa . Of the larger kangaroos, which attain a See also:weight of 200 lb and more, eight species are named, only one of which is found in Western Australia .

Fossil bones of See also:

extinct kangaroo species are met with; these kangaroos must have been of enormous See also:size, twice or thrice that of any species now living . There are some twenty smaller species in Australia and Tasmania, besides the rock wallabies and the See also:hare kangaroos; these last are wonderfully See also:swift, making clear jumps 8 or to ft. high . Other terrestrial marsupials are the See also:wombat (Phascolomys), a large, clumsy, burrowing animal, not unlike a See also:pig, which attains a weight of from 6o to too lb; the See also:bandicoot (Perameles), a See also:rat-like creature whose depredations See also:annoy the agriculturist; the native See also:cat (Dasxurus), noted robber of the poultry yard; the Tasmanian wolf (Thylacinus), which preys on large See also:game; and the recently discovered Notoryctes, a small animal which burrows like a See also:mole in the desert of the interior . Arboreal species include the well-known opossums (See also:Phalanger) ; the extraordinary tree-kangaroo of the Queensland tropics; the flying See also:squirrel, which expands a membrane between the legs and arms, and by its aid makes long sailing jumps from tree to tree; and the native See also:bear (Phascolarctos), an animal with no See also:affinities to the bear, and having a long soft See also:fur and no tail . The Myrmecobius of Western Australia is a bushy-tailed See also:ant-eater about the size of a squirrel, and from its lineage and structure of more than passing See also:interest . It is, See also:Mivart remarks, a survival of a very See also:ancient state of things . It had ancestors in a flourishing See also:condition during the Secondary See also:epoch . Its congeners even then lived in See also:England, as is proved by the fact that their See also:relics have been found in the Stonesfield oolitic rocks, the deposition of which is separated from that which gave rise to the See also:Paris Tertiary strata by an See also:abyss of past See also:time which we cannot venture to See also:express even in thousands of years . We pass on to the other curious order of non-placental mammals,' that of the Monotremata, so called from the structure of their See also:organs of evacuation with a single orifice, as in birds . Their abdominal bones are like those of the marsupials; and they are furnished with pouches for their young, but have no teats, the See also:milk being distilled into their pouches from the mammary glands . Australia and Tasmania possess two animals of this order—the See also:echidna, or spiny 948 ant-eater (hairy in Tasmania), and the See also:Platypus anatinus, the See also:duck-billed water mole, otherwise named the Ornithorhynchus paradoxus . This See also:odd animal is provided with a See also:bill or See also:beak, which is not, like that of a See also:bird, affixed to the See also:skeleton, but is merely attached to the skin and muscles .

Australia has no apes, monkeys or baboons, and no ruminant beasts . The comparatively few indigenous placental mammals, besides the See also:

dingo or wild See also:dog—which, however, may have come from the islands north of this continent—are of the See also:bat tribe and of the rodent or rat tribe . There are four species of large fruit-eating bats, called flying foxes, twenty of insect-eating bats, above twenty of See also:land-rats, and five of water-rats . The See also:sea produces three different See also:seals, which often ascend See also:rivers from the coast, and can live in lagoons of fresh water; many cetaceans, besides the " right See also:whale " and sperm whale; and the See also:dugong, found on the northern shores, which yields a valuable medicinal oil . The birds of Australia in their number and variety of species may be deemed some See also:compensation for its poverty of mammals; yet it will not stand comparison in this respect with regions of Africa and South America in the same latitudes . The See also:black See also:swan was thought remarkable when discovered, as belying an old Latin See also:proverb . There is also a See also:white See also:eagle . The See also:vulture is wanting . Sixty species of parrots, some of them very handsome, are found in Australia The emu corresponds with the See also:African and Arabian See also:ostrich, the See also:rhea of South America, and the cassowary of the See also:Moluccas and New Guinea . In New See also:Zealand this See also:group is represented by the apteryx, as it formerly was by the gigantic See also:moa, the remains of which have been found likewise in Queensland . The graceful Menura superba, or See also:lyre-bird, with its tail feathers spread in the shape of a lyre, is a very characteristic See also:form . The mound-raising megapodes, the See also:bower-See also:building satin-birds, and several others, display See also:peculiar habits .

The honey-eaters present a great diversity of plumage . There are also many kinds of game birds, pigeons, ducks, geese, plovers and quails . The See also:

ornithology of New South See also:Wales and Queensland is more varied and interesting than that of the other provinces . As for reptiles, Australia has a few tortoises, all of one See also:family, and not of great size . The " leathery turtle," which is herbivorous, and yields abundance of oil, has been caught at sea off the See also:Illawarra coast so large as 9 ft. in length . The saurians or lizards are numerous, chiefly on dry sandy or rocky ground in the tropical region . The great crocodile of Queensland has been known to attain a length of 30 ft.; there is a smaller one about 6 ft. in length to be met with in the shallow lagoons of the interior of the Northern Territory . Lizards occur in great profusion and variety . The See also:monitor, or See also:fork-tongued See also:lizard, which burrows in the See also:earth, climbs and swims, is said to grow to a length of 8 to 9 ft . This species and many others do not extend to Tasmania . The monitor is popularly known as the goanna, a name derived from the See also:iguana, an entirely different animal . There are about twenty kinds of See also:night-lizards, and many which hibernate .

One species can utter a cry when pained or alarmed, and the tall-See also:

standing frilled lizard can lift its forelegs, and squat or See also:hop like a kangaroo . There is also the See also:Moloch horridus of South and Western Australia, covered with tubercles bearing large spines, which give it a very See also:strange aspect . This and some other lizards have power to See also:change their See also:colour, not only from See also:light to dark, but over some portions of their bodies, from yellow to See also:grey or red . Frogs of many kinds are plentiful, the brilliant See also:green frogs being especially conspicuous and noisy . Australia is See also:rich in snakes, and has more than a See also:hundred different kinds . Most of these are venomous, but all are not equally dreaded . Five rather common species are certainly deadly—the See also:death See also:adder, the See also:brown, the black, the superb and the See also:tiger snakes . During the colder months these reptiles remain in a torpid state . No certain cure has been or is likely to be discovered for their See also:poison, but in less serious cases See also:strychnine has been used with See also:advantage . In tropical See also:waters a sea snake is found, which, though' very poisonous, rarely bites . Among the inoffensive species are counted the graceful green " tree snake," which pursues frogs, birds and lizards to the topmost branches of the See also:forest; also several species of pythons, the commonest of which is known as the See also:carpet snake . These great reptiles may attain a length of to ft.; they feed on small animals which they crush to death in their folds .

Phoenix-squares

The Australian seas are inhabited by many fishes of the same genera as exist in the southern parts of See also:

Asia and Africa . Of those peculiar to Australian waters may be mentioned the arripis, represented by what is called among the colonists a See also:salmon See also:trout . A very See also:fine fresh-water See also:fish is the See also:Murray See also:cod, which sometimes weighs too lb; and the See also:golden See also:perch, found in the same See also:river, has rare beauty of colour . Among the sea fish, the schnapper is of great value as an See also:article of food, and its weight comes up to 50 lb . This is the Pagrus unicolor, of the family of Sparidae, which includes also the See also:bream . Its See also:colours are beautiful, See also:pink and red with a silvery See also:gloss; but the male as it grows old takes on a singular deformity of the See also:head, with a swelling in the shape of a monstrous human-like See also:nose . These fish frequent rocky shoals off the eastern coast and are caught in See also:numbers outside See also:Port See also:Jackson for the Sydney See also:market . Two species of See also:mackerel, differing some-what from the See also:European species, are also caught on the coasts . The so-called red See also:garnet, a See also:pretty fish, with hues of carmineand See also:blue stripes on its head, is much esteemed for the table . The Trigla[FAUNA AND FLORA polyommata, or flying garnet, is a greater beauty, with its body of See also:crimson and See also:silver, and its large See also:pectoral fins, spread like wings, of a rich green, bordered with See also:purple, and relieved by a black and white spot . See also:Whiting, See also:mullet, gar-fish, rock cod and many others known by See also:local names, are in the lists of edible fishes belonging to New South Wales and See also:Victoria . Oysters abound on the eastern coast, and on the shelving See also:banks of a vast extent of the northern coast the See also:pearl See also:oyster is the source of a considerable See also:industry .

Two existing fishes may be mentioned as ranking in interest with the Myrmecobius (ant-eater) in the eyes of the naturalist . These are the Ceratodus Forsteri and the Port Jackson See also:

shark . The " mud-fish " of Queensland (Ceratodus Forsteri) belongs to an ancient order of fishes—the Dipnoi, only a few species of which have survived from past geological periods . The Dipnoi show a distinct transition between fishes and See also:amphibia . So far the mud-fish has been found only in the See also:Mary and the See also:Burnett rivers . Hardly of less scientific interest is the Port Jackson shark (Heterodonius) . It is a harmless helmeted ground-shark, living on molluscs, and almost the See also:sole survivor of a genus abundant in the Secondary rocks of See also:Europe . The eastern parts of Australia are very much richer both in their See also:botany and in their zoology than any of the other parts . This is due in part to the different See also:physical conditions there prevail- Flora. See also:ing and in part to the invasion of the north-eastern portion of the continent by a number of plants characteristically Melanesian . This element was introduced via Torres Strait, and spread down the Queensland coast to portions of the New South Wales littoral, and also See also:round the Gulf of See also:Carpentaria, but has never been able to obtain a hold in the more arid interior . It has so completely obliterated the See also:original flora, that a Queensland coast See also:jungle is almost an exact replication of what may be seen on the opposite shores of the straits, in New Guinea . This wealth of plant life is confined to the littoral and the coastal valleys, but the central valleys and the plateaux have, if not a varied flora, a considerable wealth of See also:timber trees in every way See also:superior to the flora inland in the same latitudes .

In the interior there is little change in the general aspect of the vegetation, from the Australian See also:

Bight to the region of Carpentaria, where the See also:exotic element begins . Behind the luxuriant jungles of the sub-tropical coast, once over the See also:main range, we find the purely Australian flora with its apparent sameness and sombre dulness . Physical surroundings rather than See also:latitude deter-mine the See also:character of the flora . The See also:contour lines showing the heights above sea-level are the directions along which species spread to form zones . Putting aside the exotic vegetation of the north and See also:east coast-line, the Australian See also:bush gains its peculiar character from the prevalence of the so-called See also:gum-trees (See also:Eucalyptus) and the acacias, of which last there are 300 species, but the eucalypts above all are everywhere . Dwarfed eucalypts fringe the tree-limit on Mount See also:Kosciusco, and the soakages in the parched interior are indicated by a line of the same trees, stunted and straggling . Over the vast continent from See also:Wilson's Promontory to Cape York, north, south, east and west—where anything can grow—there will be found a gum-tree . The eucalypts are remarkable for the oil secreted in their leaves, and the large quantity of astringent See also:resin of their bark . This resinous exudation (Kino) somewhat resembles gum, hence the name " gum " tree . It will not dissolve in water as gums do, but it is soluble in See also:alcohol, as resin usually is . Many of the gum-trees throw off their bark, so that it hangs in long dry strips from the See also:trunk and branches, a feature See also:familiar in " bush " pictures . The bark, resin and " See also:oils " of the eucalyptus are well known as commercial products .

As early as 1866, tannic See also:

acid, gallic acid, See also:wood spirit, acetic acid, essential oil and eucalyptol were produced from various species of eucalyptus, and researches made by Australian chemists, notably by Messrs . See also: