Witaj!
Pokaż nowe posty   Pokaż dzisiejsze posty
Wybierz swój kolor
 
  • 0 głosów - 0 średnio
Opcje Odpowiedz


/www.hockeynhlshop.us.com/

10.11.2018 11:12 /www.hockeynhlshop.us.com/
Zhuyeqing
Użytkownik
***
Posts 100
Reputation: 0
CANBERRA Nikita Kucherov Jersey , Nov. 10 (Xinhua) -- A common species of Australian pigeon uses the sound of its feathers to warn of impending danger, a local study has found.


Researchers from the Australian National University (ANU) found that rather than using vocals, the crested pigeon uses a high-pitched sound produced by its main flight feathers to warn fellow pigeons of predators.


As the pigeon flaps faster to escape danger, the tempo of the alarm signal automatically increases.


Trevor Murray, an animal communication expert from ANU, said on Friday that the team is able to prove that other crested pigeons flee when they hear the warning Ryan McDonagh Jersey , proving it is used specifically as an alarm rather than a by-product of flight.


"Crested pigeons signal danger with noisy wings, not voices," Murray said in an ANU media release.


"It shows that birds really can use their feathers as 'musical instruments' to communicate with others."


In order to prove that the pigeon's whistling feather was an alarm system, researchers used high-speed video and conducted feather-removal studies.


They found that the bird's eighth primary wing feather was responsible for the high-pitched notes with each downstroke.


It was also discovered that the ninth feather produces a low-pitched sound that it was not involved in the alarm.


Researchers played flight sounds of crested pigeons with and without their eighth feather to a flock of other pigeons.


"We show that the crested pigeon produces an acoustic alarm signal with its wings and that it is an intrinsically reliable signal of danger," Murray said.


"The alarm signal is intrinsically reliable because pigeons flap faster to escape predators, and this fast flapping automatically produces the high-tempo alarm signal."



Nobody can give up diving once they get to feel the great sensation that this sport has to offer. The moments when you get to see the beauty that lies beneath the mysterious waters are surely priceless no matter where you are. Searching for the best place to go for scuba diving is impossible; there is no such thing as the best place for this sport. The underwater world is beautiful and surprising in so many ways that you simply cannot choose to do scuba diving in the same place every time. However Tampa Bay Lightning Jersey , there are some extraordinary destinations to scuba that cannot be ignored by a fan of this sport no matter what. One of these wonderful locations is Asia, which can offer to its underwater visitors the remarkable view they want.

Asia is always full of surprises for the ones that choose it for a trip and this is available when it comes to scuba diving as well. It offers a tempting variety of dive destinations that no one can resist. If you decide to travel to Asia you have many options to choose from and you will surely want to visit each dive destination if possible. Once you get to go scuba diving in Asia you will definitely want to repeat the trip whenever you will have the time for that. You will also find that the tourism services provided there reach your standards with success.

One of the most popular locations for scuba diving in Asia is India, where you can choose from exciting places, such as Andaman and Nicobar. There you will find a diving location with a great potential that will satisfy your need for adventure. Lakshadweep Islands, also located in India, represent another beautiful location for scuba diving. Goa is a popular side vacation Vladimir Tarasenko Jersey , often chosen by tourists. You can do scuba diving around Grande Island between October and May. The visibility varies depending on the season; in what concerns the marine life, the species you will meet there are numerous.

Besides the dive sites that you can already find there, the tourism in Asia is constantly increasing so many more other dive sites are developing. You will surely find a hospitable place to stay when you are going for scuba diving in Asia. As I mentioned above, the tourism is quickly developing so the services you will benefit from will definitely be on your tastes. In every dive site you can stay in a proper resort for tourists and you will benefit from help from a local firm that deals with divers. There is no reason why not consider the trip for scuba diving in Asia an unforgettable holiday.

Whether you choose to visit India for scuba diving or you decide to go to Indonesia, Malaysia or Thailand, one thing is sure. Asia has many surprising things to offer and you will not regret for choosing it for scuba diving. The world is full of destinations that offer a beautiful experience to the ones that practice scuba diving and Asia is one of the locations that should not be avoided.

Director Hou Hsiao-Hsien Jaden Schwartz Jersey , Best Director award winner for his film "The Assassin", poses on stage during the closing ceremony of the 68th Cannes Film Festival in Cannes, southern France, May 24, 2015. Director Hou Hsiao-Hsien, Best Director award winner for his film "The Assassin" St. Louis Blues Jersey , poses on stage during the closing ceremony of the 68th Cannes Film Festival in Cannes, southern France, May 24, 2015. Director Hou Hsiao-Hsien, Best Director award winner for his film "The Assassin", poses on stage during the closing ceremony of the 68th Cannes Film Festival in Cannes Brent Burns Jersey , southern France, May 24, 2015. Director Hou Hsiao-Hsien, Best Director award winner for his film "The Assassin", poses on stage during the closing ceremony of the 68th Cannes Film Festival in Cannes, southern France Logan Couture Jersey , May 24, 2015. Director Hou Hsiao-Hsien, Best Director award winner for his film "The Assassin", poses on stage during the closing ceremony of the 68th Cannes Film Festival in Cannes, southern France, May 24 Joe Thornton Jersey , 2015. Director Hou Hsiao-Hsien, Best Director award winner for his film "The Assassin", poses on stage. Cheap Wholesale Jerseys Cheap Jerseys From China Cheap Jerseys From China Cheap Authentic NFL Jerseys Cheap Custom NFL Jerseys Cheap NFL Jerseys From China Cheap NFL Replica Jerseys Cheap Soccer Jerseys China Cheap Hockey Jerseys Wholesale Cheap NFL Football Jerseys

Odpowiedz


Skocz do:


Użytkownicy przeglądający ten wątek:
1 gości

Polskie tłumaczenie © 2007-2018 Polski Support MyBB
Silnik forum MyBB.