Search results
Results From The WOW.Com Content Network
As an example, the great tit, a European songbird, uses such a signal to call on nearby birds to harass a perched bird of prey, such as an owl. This call occurs in the 4.5kHz range, [66] and carries over long distances. However, when such prey species are in flight, they employ an alarm signal in the 7–8 kHz range.
Perch is a common name for freshwater fish from the genus Perca, which belongs to the family Percidae of the large order Perciformes. The name comes from Greek : πέρκη , romanized : perke , meaning the type species of this genus, the European perch ( P. fluviatilis ).
A passerine (/ ˈ p æ s ə r aɪ n /) is any bird of the order Passeriformes (/ ˈ p æ s ə r ɪ f ɔːr m iː z /; from Latin passer 'sparrow' and formis '-shaped') which includes more than half of all bird species.
Because of the organic acids, a pH level as low as 3.7 has been measured in some of the island's perched lakes. [107] The acidity prevents many species from inhabiting the lakes. Another perched lake on K'gari is Lake Boomanjin which, at 200 hectares in size, is the largest perched lake on any sea island in the world. [66]
coastal lakes and lagoons including perched lakes; natural freshwater inland lakes, often ephemeral and some part of wetland or swamp areas; the Main Range containing mainland Australia's five glacial lakes . [ 1 ]
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.
Cliff-top dunes, also known as perched dunes, are dunes that occur on the tops of cliffs. They are uncommon in most parts of the world, because they only develop under unusual geomorphological conditions. Processes by which they may be formed include: a dune advances up a pre-existing slope, which is then eroded to form a cliff;
Australasian figbird, catching a beetle on the wing. Hawking is a feeding strategy in birds involving catching flying insects in the air. The term usually refers to a technique of sallying out from a perch to snatch an insect and then returning to the same or a different perch, though it also applies to birds that spend almost their entire lives on the wing.