Some species in the Plethodontidae have a weak zone at the base of the tail and if the salamander is in danger or if the tail is grabbed by a predator, it breaks off, a process known as autotomy.

Some species complete their development inside the egg and hatch directly into small frogs.

Some species are carnivorous at the tadpole stage, eating insects, smaller tadpoles and fish.

Some members of the genera Ambystoma and Dicamptodon have larvae that never fully develop into the adult form but this varies with species and with populations.

Some species of salamander emit a quiet squeak or yelp if attacked.

Some unicellular species rely entirely on external energy sources and have limited or no photosynthetic apparatus.

Some of the species of Allium are important food plants for example onions ( Allium cepa ), chives ( A. schoenoprasum ), garlic ( A. sativum and A. scordoprasum ), and leeks ( A. porrum ).

Some endangered species in British Columbia are: Vancouver Island marmot, Spotted Owl, American White Pelican, and badgers.

Some birds, especially corvids and parrots, are among the most intelligent animal species ; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.

Some species, particularly songbirds and parrots, are popular as pets.

Some aspects of brain structure are common to almost the entire range of animals species ; others distinguish " advanced " brains from more primitive ones, or distinguish vertebrates from invertebrates.

Some suggest Neanderthal, Homo erectus, or Homo heidelbergensis to be the creature, but no remains of any of those species have been found in the Americas.

Some species of mold produce alpha-galactosidase, an anti-oligosaccharide enzyme, which humans can take to facilitate digestion of oligosaccharides in the small intestine.

Some species, such as the Lesser Dwarf Lemur, store fat at the hind legs and the base of the tail and hibernate.

Some rare species are viviparous.

Some cosmologists have proposed that Big Bang nucleosynthesis suggests there is a fourth " sterile " species of neutrino.

Some species and genera had a very wide distribution with only minor variations.

Some botanical species are trees having similar foliage to the Lauraceae due to convergent evolution.

Some of the country's most endangered species are the Harpy eagle, the Giant anteater, the Golden toad and the Jaguar.

* Some Dracocephalum, Glechoma and Calamintha species were formerly classified in Nepeta.

* Some crustaceans, such as the coconut crab, though mainly omnivorous, will prey on turtle hatchlings, smaller crabs species, rats, and carrion

Some species form packs or live in small family groups depending on the circumstances, including the type of available food.

Some canid species have also been trapped and hunted for their fur and, especially the gray wolf and the red fox, for sport.

Some salamanders in the genus Aneides and certain Plethodontids climb trees and have long limbs, large toepads and prehensile tails.

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.