Ornithology in the context of "Ethology"

Birds are a group of warm-blooded theropod dinosaurs constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) common ostrich. There are over 11,000 living species and they are split into 44 orders. More than half are passerine or "perching" birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. The study of birds is called ornithology.

Birds evolved from earlier theropods, and thus constitute the only known living dinosaurs. Likewise, birds are considered reptiles in the modern cladistic sense of the term, and their closest living relatives are the crocodilians. Birds are descendants of the primitive avialans (whose members include Archaeopteryx) which first appeared during the Late Jurassic. According to some estimates, modern birds (Neornithes) evolved in the Late Cretaceous or between the Early and Late Cretaceous (100 Ma) and diversified dramatically around the time of the Cretaceous–Paleogene extinction event 66 million years ago, which killed off the pterosaurs and all non-ornithuran dinosaurs.

Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs (often simply birdsong) are the sounds produced by birds that are melodious to the human ear. In ornithology and birding, songs (relatively complex vocalizations) are distinguished by function from calls (relatively simple vocalizations).

A spectrogram is a visual representation of the spectrum of frequencies of a signal as it varies with time. When applied to an audio signal, spectrograms are sometimes called sonographs, voiceprints, or voicegrams. When the data are represented in a 3D plot they may be called waterfall displays.

Spectrograms are used extensively in the fields of music, linguistics, sonar, radar, speech processing, seismology, ornithology, and others. Spectrograms of audio can be used to identify spoken words phonetically, and to analyse the various calls of animals.

Fumihito, Crown Prince Akishino (秋篠宮皇嗣文仁親王, Akishino-no-miya Kōshi Fumihito Shinnō; born 30 November 1965, Japanese: [ɸɯmiꜜçi̥to]) is the heir presumptive to the Japanese throne. He is the younger brother of Emperor Naruhito, and the younger son of Emperor Emeritus Akihito and Empress Emerita Michiko. Since his marriage in June 1990, he has had the title Prince Akishino (秋篠宮, Akishino-no-miya) and has headed the Akishino branch of the Imperial House of Japan.

Fumihito has a bachelor's degree in political science from Gakushuin University and a Doctor of Philosophy degree in ornithology from the Graduate University for Advanced Studies. In 1990, he married Kiko Kawashima, with whom he has three children: Mako, Kako, and Hisahito. In November 2020, Fumihito was officially declared the heir presumptive to the throne, during the Ceremony for Proclamation of Crown Prince (Rikkōshi-Senmei-no-gi) in Tokyo. Preceding his investiture as Crown Prince, the ongoing Japanese imperial succession debate had resulted in some politicians holding a favorable view on rescinding agnatic primogeniture, which was implemented in 1889 and reinforced on the constitution of Japan by the Allies after World War II. However, once Fumihito and Kiko had their son Hisahito in September 2006, he became next in the line of succession following his father. Fumihito's niece and Emperor Naruhito's only child, Princess Aiko, remains at present legally ineligible to inherit the throne, while debate about the possibility of having future empresses regnant continues.

John Ruskin (8 February 1819 – 20 January 1900) was an English polymath – a writer, lecturer, art historian, art critic, draughtsman and philanthropist of the Victorian era. He wrote on subjects as varied as art, architecture, political economy, education, museology, geology, botany, ornithology, literature, history, and myth.

Ruskin's writing styles and literary forms were equally varied. He wrote essays and treatises, poetry and lectures, travel guides and manuals, letters and even a fairy tale. He also made detailed sketches and paintings of rocks, plants, birds, landscapes, architectural structures and ornamentation. The elaborate style that characterised his earliest writing on art gave way in time to plainer language designed to communicate his ideas more effectively. In all of his writing, he emphasised the connections between nature, art and society.

Primatology is the scientific study of primates. Unlike branches of zoology focused on specific animal groups (such as ornithology, the study of birds), primatology – and the primate order — includes both human and nonhuman animals. Thus, the field entails significant overlap with anthropology, the study of humans, and related sciences.

Primatology encompasses a broad swath of scientists from different fields of study, each with distinct perspectives. For example, behavioral ecologists may focus on ways primate species act in different environments or circumstances. Sociobiologists are concerned with genetic inheritance and primates' physical and behavioral traits. Anthropologists tend to focus on humans' evolutionary history; they look to primates for greater insights into how Homo Sapiens have evolved. Comparative psychologists study differences between human and nonhuman primate minds.