Search results
Results From The WOW.Com Content Network
Flightless birds are birds that cannot fly, as they have, through evolution, lost the ability to. [1] There are over 60 extant species, [2] including the well-known ratites (ostriches, emus, cassowaries, rheas, and kiwis) and penguins. The smallest flightless bird is the Inaccessible Island rail (length 12.5 cm, weight 34.7
A flock of barnacle geese during autumn migration Examples of long-distance bird migration routes. 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. Migration is inherently risky, due to predation and mortality.
Contrary to expectations, the large birds adapted well to conditions in the German countryside. [18] A monitoring system has been in place since 2008. [19] By 2014, there was already a population of well over 100 birds in an area of 150 square kilometres (58 sq mi) between the river Wakenitz and the A20 motorway, slowly expanding eastward. [20]
The hoatzin (/ h oʊ ˈ æ t s ɪ n / hoh-AT-sin) [note 1] or hoactzin (/ h oʊ ˈ æ k t s ɪ n / hoh-AKT-sin) (Opisthocomus hoazin) [4] is a species of tropical bird found in swamps, riparian forests, and mangroves of the Amazon and the Orinoco basins in South America.
Eurasian cranes in a V formation (video) Birds flying in V formation. A V formation is a symmetric V- or chevron-shaped flight formation.In nature, it occurs among geese, swans, ducks, and other migratory birds, improving their energy efficiency, while in human aviation, it is used mostly in military aviation, air shows, and occasionally commercial aviation.
Most of these birds fly south along the eastern edge of the Tibetan Plateau and stop in northeastern India and Bangladesh for several months. In late November the falcons cross India and fly in great flocks 3,000 kilometres (1,900 mi) over the Indian Ocean to Somalia and Kenya. They return via the Arabian peninsula, Iran, Afghanistan and Pakistan.
A hoopoe was a leader of the birds in the Persian book of poems The Conference of the Birds (Mantiq al-Tayr by Attar) and when the birds seek a king, the hoopoe points out that the Simurgh was the king of the birds. [34] Hoopoes were thought of as thieves across much of Europe, and harbingers of war in Scandinavia. [35]
For studying the movement of birds around Falsterbo bird observatory, a migration hotspot south-west of Sweden, three receivers were used to triangulate and track the birds. [ 6 ] The combination of small transmitters and triangulation via many receivers has transformed the area of avian studies, allowing scientists to unearth minute data about ...