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 breeds have been developed through centuries of crossings with other breeds, while others, such as Tennessee Walking Horses and Morgans, developed from a single sire from which all current breed members descend.

Some breed registries have a closed stud book, where registration is based on pedigree, and no outside animals can gain admittance.

Some processes involving neutrons are notable for absorbing or finally yielding energy — for example neutron kinetic energy does not yield heat immediately if the neutron is captured by a uranium-238 atom to breed plutonium-239, but this energy is emitted if the plutonium-239 is later fissioned.

Some breed in lakes, some in temporary puddles.

Some breed in marshes, some in salt-marshes.

Some species of mosquitoes prefer to breed in phytotelmata ( natural reservoirs on plants ) such as rainwater accumulated in holes in tree trunks, or in the leaf-axils of bromeliads.

Some desert region cheetahs are unusually pale ; probably they are better-camouflaged and therefore better hunters and more likely to breed and pass on their paler coloration.

Some species, such as the Uria guillemots, nest in large colonies on cliff edges ; others, like the Cepphus guillemots, breed in small groups on rocky coasts ; and the puffins, auklets and some murrelets nest in burrows.

Some noted appearances of the animal in literature include the short story Pigs Is Pigs by Ellis Parker Butler is a tale of bureaucratic incompetence ; two guinea pigs held at a train station breed unchecked while humans argue as to whether they are " pigs " for the purpose of determining freight charges.

Some Cornish Rexes also have a mild cheesy smell peculiar to the breed ; this odor comes from scent glands in the paws.

Some of the birds have attempted to breed on Genovesa ( Tower ) Island, but unsuccessfully.

Some of the local farmers breed horses, and horse shows are held every second year.

Some breed parent clubs and canine registries in Europe have even made the culling of ridgeless whelps a requirement.

Some flocks of the same breed may be entirely free from cannibalism, while others, under the same management, may have a serious outbreak.

Some species breed seasonally, to avoid competition with other species for burrows, to avoid predation or to take advantage of seasonally abundant food.

Some breeds, such as the Norwegian Fjord Horse, Appaloosa, American Paint Horse, Friesian and Haflinger have distinct physical characteristics and recorded pedigrees, but also typically have distinctive or colorful coats might be considered a " color breed " by some, but they are a pedigree-based breed.

Some individuals of this breed are prone to interdigital cysts, which are cysts that form between the toes.

Some lines of the breed still retain dominant and aggressive temperaments ; other than these lines, the AWS gets on well with children and enjoys playing with them.

Some birds breed inland, and in western Europe they nest as far south as northern France.

Some people have proposed a hybrid fusion / fission schemes to use the large amount of neutrons produced in muon-catalyzed d-t nuclear fusions to breed fissile fuels, from fertile material-for example, thorium-232 could breed uranium-233 in this way.

Some birds breed in Alaska where their range overlaps with the Pigeon Guillemot.

Some of the more widely acknowledged factors for developing bloat include increased age, breed, having a deep and narrow chest, stress, eating foods such as kibble that expand in the stomach, overfeeding, too much water consumption in a small period of time ; before or after exercise and other causes of gastrointestinal disease and distress.