Most species seem to prefer a ready-made hollow such as a deserted mouse nest, a bird house, or the hole made by a woodpecker ; ;

The free living larvae are normally fully aquatic but the tadpoles of some species such as ( Nannophrys ceylonensis ) are semi-terrestrial and live among wet rocks.

Males normally exhibit such behaviour though in some species, females and even juveniles are also involved.

In some species, such as the fire-bellied toad ( Bombina spp.

The order is a cosmopolite ( plants found throughout most of the world including desert and frigid zones ), and includes mostly herbaceous species, although a small number of trees ( such as the giant Lobelia and the giant Senecio ) and shrubs are also present.

Environmental ethics is concerned with questions such as the duties of humans towards landscapes or species.

( If the condition is thought to be cellulitis rather than abscess, consideration should be given to possibility of strep species as cause that are still sensitive to traditional anti-staphylococcus agents such as dicloxacillin or cephalexin in patients able to tolerate penicillin ).

These snails cling solidly with their broad muscular foot to rocky surfaces at sublittoral depths, although some species such as Haliotis cracherodii used to be common in the intertidal zone.

A number of species such as the Royal Cinclodes and White-browed Tit-spinetail are associated with Polylepis, and consequently also threatened.

Common side-effects include diarrhea, resulting from disruption of the species composition in the intestinal flora, resulting, for example, in overgrowth of pathogenic bacteria, such as Clostridium difficile.

Antibacterials such as penicillin and erythromycin, which used to have high efficacy against many bacterial species and strains, have become less effective, because of increased resistance of many bacterial strains.

The open savannas are the home of large ungulates, especially antelopes, the giraffe ( peculiar to Africa ), zebra, buffalo, wild donkey and four species of rhinoceros ; and of carnivores, such as the lion, leopard, hyena, etc.

Abounding in rivers and shores, it offers a wide diversity of fish species, such as dorado, pacú, surubi, boga and silverside.

Marine species such as salmon, spider crabs, squid and other shellfish and molluscs may be fished in this region's shores.

This could possibly be because the plants need a stronger network to survive in a harsher environment, so their interactions between species, such as cross-pollination or mutualistic actions, become more common to cope with the severity of their habitat.

When a group of different plant species was prompted by a variety of different stress signals, such as drought or cold, each plant responded uniquely.

Australia has several indigenous plants which are popular among modern ayahuasqueros there, such as various DMT-rich species of Acacia.

Many defoliated forest areas were quickly invaded by aggressive pioneer species, such as bamboo and cogon grass, which make it unlikely the forests will be able to regenerate.

Effects such as superposition of differing ions with multiple electrons removed, or through the presence of complex species formation during evaporation may cause two or more species to have sufficiently close time-of-flights to make definitive identification impossible.

The outback is home to a diverse set of animal species, such as the kangaroo, emu and dingo.

The outback is home to a diverse set of animal species, such as the kangaroo, emu and dingo.

Acid rain has eliminated insect life and some fish species, including the brook trout in some lakes, streams, and creeks in geographically sensitive areas, such as the Adirondack Mountains of the United States.

Soil chemistry can be dramatically changed when base cations, such as calcium and magnesium, are leached by acid rain thereby affecting sensitive species, such as sugar maple ( Acer saccharum ).

There are deer, cottontail rabbit, fox, raccoon, muskrat, beaver, weasel and over 200 species of birds seen here.

Mammals which call these places home include the red fox, long-tailed weasel, mink, muskrat, woodchuck, several bat species, bottlenose dolphins, harbour porpoises and possibly river otters which are close to local extinction in Long Island with only an estimated 8 individuals thought to have recently migrated from Connecticut.

Key species are Raccoon Dog, muskrat ( appeared recently ), European Hare, house mouse, brown rat, wild boar.

The muskrat ( Ondatra zibethicus ), the only species in genus Ondatra, is a medium-sized semiaquatic rodent native to North America, and introduced in parts of Europe, Asia, and South America.

The muskrat is the largest species in the subfamily Arvicolinae, which includes 142 other species of rodents, mostly voles and lemmings.

Southeast, accessed by the San Joaquin River, Frank ’ s Tract, a protected wetland marsh, is home to beaver, muskrat, river otter, mink and 76 species of birds.

Other relatively abundant wildlife species that rely on this watershed include westslope cutthroat trout, brook trout, kokanee salmon, white-tailed deer, mule deer, moose, elk, black bear, mountain lion, mountain goat, river otter, mink, muskrat, beaver, osprey, peregrine falcon, turtles, a variety of hawks and owls, migratory songbirds and waterfowl, several species of game birds, and many other wetland species.

However, due to loss of habitat ( farming ), water pollution, illegal fishing nets, and the introduction of non-native species ( e. g., muskrat ), population levels continue to decline.

Wildlife includes brown bears, black bears, the endemic Alexander Archipelago wolf, Sitka black-tailed deer, humpback whales, orcas, five species of salmon, bald eagles, harlequin ducks, scoters, and marbled murrelets.

Although all sea ducks readily feed on shallow-water molluscs, no Western Atlantic bird species seems to have been as dependent on such food as much as the Labrador Duck.

As a result of these factors, males are typically more willing to mate than females, and so females are typically the ones doing the choosing ( except in cases of forced copulations, which can occur in certain species of primates, ducks, and others ).

Various species of penguins and other flighted or flightless water birds such as auks, cormorants, guillemots, shearwaters, eider and scoter ducks and diving petrels are avid swimmers, and use their wings to propel through water.

The ducks are divided among several subfamilies in the Anatidae family ; they do not represent a monophyletic group ( the group of all descendants of a single common ancestral species ) but a form taxon, since swans and geese are not considered ducks.

Numerous ducks have managed to establish themselves on oceanic islands such as Hawaii, New Zealand and Kerguelen, although many of these species and populations are threatened or have become extinct.

In many areas, wild ducks of various species ( including ducks farmed and released into the wild ) are hunted for food or sport, by shooting, or formerly by decoys.

Wild ducks of many species and domesticated breeds are widely consumed around the world.

Examples are the geese, swans, gulls, loons, and a few species of ducks.

This region is well known for its abundance of bird species such as dove, quail, ducks, pheasant and geese.

Once a wild and pristine environment rich with native wildlife, non-native species such as the dozens of domesticated ducks and geese and Eurasian mute swans released here by people over the years, as well as artificially high amounts of food due to feedings have produced an environment that holds far more animals than the area could ever naturally sustain.

Propulsion underwater can be provided by wings ( as used by penguins, auks, diving petrels, and some other species of petrel ) or feet ( as used by cormorants, grebes, loons and several types of fish-eating ducks ).

Around 260 various bird species nest here ( wild geese and ducks, Great White Egret, White Stork, Black Stork, White-tailed Eagle, crows, coots, gulls, terns, kingfishers, European Green Woodpecker, etc.

As of 2005, migratory birds began to make a comeback at the park with the eradication and relocation of introduced species such as geese and ducks which were aggressive to other species.

Many of the ducks display sexual dimorphism, with the males being more brightly coloured than the females ( although the situation is reversed in species like the Paradise Shelduck ).

While this species never raises its own young, a number of other ducks will occasionally lay eggs in the nests of conspecifics ( members of the same species ) in addition to raising their own broods.

Humans have had a long relationship with ducks, geese and swans ; they are important economically and culturally to humans, and several duck species have benefited from an association with people.

** Dendrocygna, whistling ducks ( 9 living species )

* Subfamily: Anatinae, dabbling ducks and moa-nalos ( The dabbling duck group, of worldwide distribution, were previously restricted to just one or two genera, but had been extended to include 8 extant genera and about 55 living species, including several genera formerly known as the " perching ducks "; mtDNA on the other hand confirms that the genus Anas is over-lumped and casts doubt on the diving duck affiliations of several genera below.