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Bird Migration
Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or from south to north. Animal migration, Migration is inherently risky, due to predation and mortality. The Arctic tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds and the Antarctic each year. Some species of Procellariiformes, tubenoses, such as albatrosses, circle the Earth, flying over the southern oceans, while others such as Manx shearwaters migrate between their northern breeding grounds and the southern ocean. Shorter migrations are common, while longer ones are not. The shorter migrations include altitudinal migrations on mountains, including the Andes and Himalayas. The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the Sun and stars, the Earth's magnetic field, and mental maps. Histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scythia
Scythia (, ) or Scythica (, ) was a geographic region defined in the ancient Graeco-Roman world that encompassed the Pontic steppe. It was inhabited by Scythians, an ancient Eastern Iranian equestrian nomadic people. Etymology The names and are themselves Latinisations of the Ancient Greek names () and (), which were themselves derived from the ancient Greek names for the Scythians, () and (), derived from the Scythian endonym . Geography Scythia proper The territory of the Scythian kingdom of the Pontic steppe extended from the Don river in the east to the Danube river in the west, and covered the territory of the treeless steppe immediately north of the Black Sea's coastline, which was inhabited by nomadic pastoralists, as well as the fertile black-earth forest-steppe area to the north of the treeless steppe, which was inhabited by an agricultural population. The northern border of this Scythian kingdom were the deciduous woodlands, while several rivers, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Stork
The white stork (''Ciconia ciconia'') is a large bird in the stork family, Ciconiidae. Its plumage is mainly white, with black on the bird's wings. Adults have long red legs and long pointed red beaks, and measure on average from beak tip to end of tail, with a wingspan. The two subspecies, which differ slightly in size, breed in Europe north to Finland, northwestern Africa, Palearctic east to southern Kazakhstan and southern Africa. The white stork is a long-distance migrant, wintering in Africa from tropical Sub-Saharan Africa to as far south as South Africa, or on the Indian subcontinent. When migrating between Europe and Africa, it avoids crossing the Mediterranean Sea and detours via the Levant in the east or the Strait of Gibraltar in the west, because the air thermals on which it depends for soaring do not form over water. A carnivore, the white stork eats a wide range of animal prey, including insects, fish, amphibians, reptiles, small mammals and small birds. It take ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Natterer
Johann Natterer (9 November 1787 – 17 June 1843) was an Austrian natural history, naturalist and List of explorers, explorer. He was the son of royal falconer Joseph Natterer and along with his brother Joseph Natterer (1786–1852) took a keen interest in natural history. He collected natural history specimens extensively from South America and numerous species from his collections were named after him. Family and early life Johann Natterer was born in Laxenburg, Laxenberg, the son of the natural history specimen collector and falconer Joseph Natterer Sr. (1754–1823) and Maria Anna Theresia Schober (his mother), the daughter of a master baker from Laxenburg. He had a brother (Joseph Natterer, 1786–1852). Joseph Natterer Sr. was the last mounted falconer of Austria. When Francis II, Holy Roman Emperor, Emperor Franz I dissolved the falconry (''Falknerei'') in Laxenburg, he bought the collection of Joseph Natterer Sr. This contained numerous domestic birds, mammals, and insec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
