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The Nearctic realm is one of the eight biogeographic realms constituting the Earth's land surface. The Nearctic realm covers most of North America, including...

A grison (/ˈɡrɪzən/, /ˈɡraɪsən/) is any mustelid in the genus Galictis. Native to Central and South America, the genus contains two extant species: the...

Alpha (α) motor neurons (also called alpha motoneurons), are large, multipolar lower motor neurons of the brainstem and spinal cord. They innervate extrafusal...

Fathead minnow (Pimephales promelas), also known as fathead or tuffy, is a species of temperate freshwater fish belonging to the genus Pimephales of the...

The Pacific tree frog (Pseudacris regilla), also known as the Pacific chorus frog, has a range spanning the Pacific Northwest, from Northern California...

Functional selectivity (or “agonist trafficking”, “biased agonism”, “biased signaling”, "ligand bias" and “differential engagement”) is the ligand-dependent...

An aptychus is a type of marine fossil. It is a hard anatomical structure, a sort of curved shelly plate, now understood to be part of the body of an ammonite...

The New Mexico whiptail (Aspidoscelis neomexicanus) is a female-only species of lizard found in New Mexico and Arizona in the southwestern United States...

Wildness, in its literal sense, is the quality of being wild or untamed. Beyond this, it has been defined as a quality produced in nature and that which...

Daniel Elliot Stuntz (March 15, 1909 - March 5, 1983) was an American mycologist. He was often called "Bud" by his family and colleagues. When Stuntz was...

Romer's tree frog (Liuixalus romeri) is a species of frog native to Hong Kong and a small portion of Guangxi, China. With an average snout-vent length...

The pileated flycatcher (Xenotriccus mexicanus) is a species of bird in the family Tyrannidae; it is endemic to western Mexico. It is a small bird with...

The genus Pinguicula contains the 83 species of butterworts, belonging to the bladderwort family (Lentibulariaceae). It has a natural distribution across...

Theodore Christian Schneirla (July 23, 1902, Bay City, Michigan — Aug. 20, 1968, New York, N.Y.) was an American animal psychologist who performed some...

Gladys Elizabeth Baker (July 22, 1908 – July 7, 2007) was an American mycologist, teacher, and botanical illustrator, known for her extensive work in biological...

The European Wildlife is a Pan-European non-profit organization. Its main goal is nature conservation. The European Wildlife key objective is to conserve...

Fedaiellidae is an extinct family of fossil sea snails, marine gastropod mollusks in the clade Neritimorpha. Fossils of the genus Fedaiella are found in...

Bronchocela jubata, commonly known as the maned forest lizard, is a species of agamid lizard found mainly in Indonesia on the islands of Singkep, Java...

The National Herbarium at Peradeniya, near Kandy in the Central province of Sri Lanka, was started in about 1821 by Alexander Moon, who was the director...

The Aoufous Formation is a geological formation that contains some of the vertebrate assemblage of the Kem Kem Group, of Late Cretaceous date. Two other...