Some salamanders have fewer digits and the Amphiumas are eel-like in appearance with tiny stubby legs.

Some salamanders adopt defensive poses when faced by a potential predator such as the North American northern short-tailed shrew ( Blarina brevicauda ).

Some salamanders that are terrestrial have lungs that are used in respiration, although these are simple and sac-like, unlike the more complex organs found in mammals.

Some salamanders also utilize vernal pools for reproduction, but the adults may visit the pool only briefly.

Some authorities further divide this genus into three, splitting off the smooth-fronted caimans into a genus Paleosuchus and the Black Caiman into Melanosuchus.

Some plants of the completely unrelated genus Viburnum are sometimes inaccurately called " highbush cranberries " ( Viburnum trilobum ).

Some carnivorous plants, such as pitcher plants of the genus Nepenthes, obtain nourishment from the feces of commensal animals.

Some South American plants formerly thought of as Daturas are now treated as belonging to the distinct genus Brugmansia ( Brugmansia differs from Datura in that it is woody, making shrubs or small trees, and in that it has pendulous flowers, rather than erect ones ).

Some ornithologists still feel it is more appropriate to retain the species in the genus Alca, however.

Some scientists, such as Adrian Lister, grouped all the species as one genus, the Alcinae, while others, such as Augusto Azzaroli, used the term " alces " for the living species, placing the fossile species into the subgenera " Cervalces " and " Libralces.

Some authors do not recognize Choristylis as a separate genus from Itea.

Some, such as members of the genus Toxorhynchites, actually are beneficial predators of other mosquitoes.

Some specialise in the liquid in pitchers of particular species of pitcher plants, their larvae feeding on decaying insects that had drowned there or on the associated bacteria ; the harmless genus Wyeomyia provides such examples — Wyeomyia smithii breeds only in the pitchers of Sarracenia purpurea.

Some other species, for example members of the genus Mansonia, lay their eggs in arrays, attached usually to the under-surfaces of waterlily pads.

Some groups, like the genus Vetulicola, were more streamlined ( complete with ventral keels ) than other groups, such as the tadpole-like Didazoonidae.

Some cloud varieties are not restricted to a specific altitude range or physical structure, and can therefore be common to more than one genus or species.

Some have diverged from the mainstream of the genus to the extent that they are quite isolated genetically and are able to be recognised by only a few relatively invariant characteristics.

Some botanists treat Oxycoccus as a distinct genus.

Some tropical shearwaters, like the Christmas Shearwater, are able to nest on cycles slightly shorter than a year, and the large great albatrosses ( genus Diomedea ) nest in alternate years ( if successful ).

Some plants produce natural herbicides, such as the genus Juglans ( walnuts ), or the tree of heaven ; such action of natural herbicides, and other related chemical interactions, is called allelopathy.

Some better known species that represent the diversity of the genus include the Common Fig which is a small temperate deciduous tree whose fingered fig leaf is well known in art and iconography ; the Weeping Fig ( F. benjamina ) a hemi-epiphyte with thin tough leaves on pendulous stalks adapted to its rain forest habitat ; the rough-leaved sandpaper figs from Australia ; the Creeping Fig ( F. pumila ), a vine whose small, hard leaves form a dense carpet of foliage over rocks or garden walls.

Some other types of related bees produce and store honey, but only members of the genus Apis are true honey bees.

Some EcM fungi, such as many Leccinum and Suillus, are symbiotic with only one particular genus of plant, while other fungi, such as the Amanita, are generalists that form mycorrhizas with many different plants.

Some species, mostly in the genus Falco, are fully migratory, with some species summering in Eurasia and wintering entirely in Africa, other species may be partly migratory.

Some members of the genus Tradescantia may cause allergic reactions in pets ( especially cats and dogs ), characterised by red, itchy skin.

Some species, like some in the genus Senna, have asymmetric flowers, with one of the lower petals larger than the opposing one, and the style bent to one side.

Some microorganisms – for example, bacteria of the genus Shigella – secrete substances known as cytotoxins, which kill and damage intestinal tissue on contact.

Some distribution costs are kept up by competitive pressure, some by the fact that the customers have come to expect certain niceties and flourishes.

Some school systems provide written instructions to principals and teachers designating when certain information is to be recorded on cumulative record forms and explaining how the information is to be summarized and used.

Some researchers have speculated that this minority of Haplogroup C3 carriers among the Ainu may reflect a certain degree of unidirectional genetic influence from the Nivkhs, a traditionally nomadic people of northern Sakhalin and the adjacent mainland, with whom the Ainu have long-standing cultural interactions.

Some information is known about the family origins of Amasis: his mother was a certain Tashereniset as a bust statue of this lady, which is today located in the British Museum, shows.

Some Nasheed singers avoid instruments in the background due to the opinion of certain scholars that their use is prohibited.

Some legitimate customers had problems with this though if they made certain changes to their own phone, such as replacing the battery and / or antenna.

Some battle-survivors have nightmares about the conditions they encountered, or abnormal reactions to certain sights or sounds.

Some of its powers may, according to its articles, be exercised by directors, certain other powers may be reserved for the shareholders in general meeting.

Some printer technologies don't work with certain types of physical media, such as carbon paper or transparencies.

Some collectors focus on coins of a certain nation or historic period.

Some collectors are completists and seek an example of every type of coin within a certain category.

Some, like Henry Sidgwick, argue that a certain degree of egoism promotes the general welfare of society for two reasons: because individuals know how to please themselves best, and because if everyone were an austere altruist then general welfare would inevitably decrease.

Some critical observers consider that Uribe's policies, while admittedly reducing crime and guerrilla activity, might be too slanted in favor of a military solution to Colombia's internal war, neglecting grave social and human rights concerns to a certain extent.

Some people speak of cultural coercion when the fear of falling out with the group may force people into wearing a certain style of dress, publicly reciting a creed or a pledge of allegiance which they find ethically reprehensible or starting to smoke when they would have preferred not to etc.

Some studies have shown that ingredients in curry may help to prevent certain diseases, including colon cancer and Alzheimer's disease.

Some systems also include a hidden flag to make certain files invisible ; this flag is used by the computer system to hide essential system files that users should not alter.

Some error-correcting codes are based on special checksums that not only detect common errors but also allow the original data to be recovered in certain cases.

Some cells are specific to spatial information, certain stimuli ( smells, etc.

Some groups advocate certain prepared foods or special menus, while others train dieters to make healthy choices from restaurant menus and while grocery-shopping and cooking.

Some players use the more nimble tips of the fingers to play fast-moving solo passages or to pluck lightly for quiet tunes. The use of amplification allows the player to have more control over the tone of the instrument, because amplifiers have equalization controls that allow the bassist to accentuate certain frequencies ( often the bass frequencies ) while de-accentuating some frequencies ( often the high frequencies, so that there is less finger noise ).

Some jurisdictions classify as violent certain property crimes involving a strong likelihood of psychological trauma to the property owner ; for example, Virginia treats both common-law burglary ( the breaking and entering of a dwelling house at night with the intent to commit larceny, assault and battery, or any felony therein ) and statutory burglary ( breaking and entering with further criminal intent but without the dwelling-house or time elements, such that the definition applies to break-ins at any time and of businesses as well as of dwelling houses ) as felonies.

Some types of recessive gene disorders confer an advantage in certain environments when only one copy of the gene is present.

Some newspapers carry " gossip columns " which detail the social and personal lives of celebrities or of élite members of certain communities.

Some dietary or religious customs forbid the use of gelatin from certain animal sources, and medical issues may limit or prevent its consumption by certain people.