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 dietitians recommend that these be supplied from foods in which they occur naturally, or at least as complex compounds, or sometimes even from natural inorganic sources ( such as calcium carbonate from ground oyster shells ).

Some is used in applications where its extremely high density makes it valuable, such as the keels of yachts, and anti-tank shells.

Some evidence exists that Barbados may not have been settled in the second millennium BC, but this is limited to fragments of conch lip adzes found in association with shells radiocarbon dated to c. 1630 BC.

Some scientists consider a close relationship of sipunculans and the extinct hyoliths, operculate shells from the Palaeozoic, with which they share the helically twisted gut.

Some Unix shells use the ampersand as a metacharacter:

Some Unix shells, like the POSIX standard shell, use the ampersand to execute a process in the background and to duplicate file descriptors.

Some smaller-caliber AP shells have an inert filling, or incendiary charge in place of the HE bursting charge.

Some shooting enthusiasts reload their fired brass cases and plastic, paper, or brass shotgun shells.

Some shell collectors find their own material and keep careful records, or buy only " specimen shells ", which means shells which have full collecting data: information including how, when, where, in what habitat, and by whom, the shells were collected.

Some owners of shell collections hope to be able to donate their collection to a major natural history or zoology museum at some point, however, shells with little or no collecting data are usually of no value to science, and are likely not to be accepted by a major museum.

* Some tribes of the indigenous peoples of the Americas used shells for wampum and hair pipes.

Some polychaetes, marine annelid worms in the family Serpulidae, secrete a hard tube made of calcium carbonate, adhering to stones or other shells.

Some eggs, like emu or ostrich eggs, are so large and strong that the shells may be carved without breaking.

Some burst in the air like shells.

Some locals believe it was a misspelling of Conchilla, a Spanish word for the small white snail shells found in the valley's sandy soil, vestiges of a lake which dried up over 3, 000 years ago.

Some Cloudina shells even show evidence of predation, in the form of borings .< ref name = Hua2003 >

Some Precambrian ( Ediacaran ) organisms produced tough but non-mineralized outer shells, while others, such as Cloudina, had a calcified exoskeleton, but mineralized skeletons did not become common until the beginning of the Cambrian period, with the rise of the " small shelly fauna ".

Some examples are via a helium balloon, through fireworks, shot from shotgun shells, or scattered from an airplane.

Some predatory carnivorous gastropods include, for example: Cone shells, Testacella, Daudebardia, Ghost slug and others.

Some contemporary Dagaaba communities of northern Ghana are notable as the last West African communities to still use Cowrie shells as currency, alongside the modern Ghanaian cedi.

Some of these bombs were designed with ceramic ( porcelain ) shells, an idea proposed by Ishii in 1938.

Some still maintained jade stones, implying the significance of conch shells within their tribal society.