HOME >> BIOLOGY >> NEWS
Chickadees' alarm calls carry information about size, threat of predators

There's more than meets the human ear when the black-capped chickadee lets its flock mates know a predator is lurking about by giving out its familiar "chick-a-dee-dee-dee" call.

The small songbirds, which are common throughout much of North America, use that signature call in a wide variety of social interactions including warning of predators. And it turns out that those alarms are far more subtle and information-packed than scientists previously imagined.

Writing in the current issue of the journal Science, researchers report that chickadees use one of the most sophisticated signaling systems discovered among animals. The calls warn other chickadees not only if a predator is moving rapidly, but also transmit information on the degree of threat posed by stationary predators of different sizes.

Chris Templeton, a biology doctoral student at the University of Washington and lead author of the study, said chickadees produce two very different alarm signals in response to predators. When they see flying raptors birds of prey such as hawks, owls and falcons they produce a soft, high-pitched "seet" call. But when they see a stationary or perched predator, the birds use a loud, wide spectrum chick-a-dee-dee-dee alarm to recruit other chickadees, as well as other bird species, to harass or mob the predator. Spectrographic analysis of more than 5,000 recorded chickadee mobbing alarm calls made under semi-natural conditions showed that the acoustic features of the calls varied with the size of the predator. And when the recordings were played back to the birds through speakers, their mobbing behavior was related to the size and threat presented by the potential predator.

Templeton said chickadees can alter their mobbing calls in a number of ways, most of which humans can not hear. Most typically they change the dee dee dee not at the end of the call, sometimes adding five, 10 or 15 dees.

"You would certainly might notice a change in
'"/>

Contact: Joel Schwarz
joels@u.washington.edu
206-543-2580
University of Washington
23-Jun-2005


Page: 1 2

Related biology news :

1. Plants tag insect herbivores with an alarm
2. Eavesdropping nuthatches distinguish danger threats in chickadee alarm calls
3. Nuclear medicine patients: No-alarm holiday travel tips
4. Infection alarm yields clues to immune system behavior
5. Bird song changes sound alarm over habitat fragmentation
6. Blips in HIV treatment are not cause for alarm
7. Rat brains executive hub quells alarm center if stress is controllable
8. Young meerkats learn the emotion before the message in threat calls
9. Fisheries group calls for science-based approach to address climate impacts
10. Male reindeer inflate a large air sac in the neck region to emit their hoarse rutting calls
11. Report calls for improved monoclonal antibodies against solid tumors

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/13/2016)... -- IMPOWER physicians supporting Medicaid patients in Central ... in telehealth thanks to a new partnership with higi. ... patients can routinely track key health measurements, such as ... when they opt in, share them with IMPOWER clinicians ... retail location at no cost. By leveraging this data, ...
(Date:3/31/2016)... 2016  Genomics firm Nabsys has completed a financial ... Bready , M.D., who returned to the company in ... leadership team, including Chief Technology Officer, John Oliver ... Nurnberg and Vice President of Software and Informatics, ... Dr. Bready served as CEO of Nabsys from ...
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... , ... June 27, 2016 , ... ... bring innovative medical technologies, services and solutions to the healthcare market. The company's ... of various distribution, manufacturing, sales and marketing strategies that are necessary to help ...
(Date:6/24/2016)... , June 24, 2016  Regular discussions on a range ... place between the two entities said Poloz. Speaking ... Ottawa , he pointed to the country,s inflation ... federal government. "In ... "Both institutions have common economic goals, why not sit down ...
(Date:6/23/2016)... WA (PRWEB) , ... June 23, 2016 , ... ... announces the release of its second eBook, “Clinical Trials Patient Recruitment and Retention ... recruitment and retention in this eBook by providing practical tips, tools, and strategies ...
(Date:6/23/2016)... 2016 A person commits a crime, and the ... track the criminal down. An outbreak of foodborne ... Administration (FDA) uses DNA evidence to track down the bacteria ... far-fetched? It,s not. The FDA has increasingly used a complex, ... foodborne illnesses. Put as simply as possible, whole genome sequencing ...
Breaking Biology Technology:
Cached News: