Featured Research

from universities, journals, and other organizations

Ravens remember relationships they had with others

Date:
April 19, 2012
Source:
University of Vienna
Summary:
In daily life we remember faces and voices of several known individuals. Similarly, mammals have been shown to remember calls and faces of known individuals after a number of years. Ravens have now been found to differentiate individuals based on familiarity. Additionally, scientists discovered that ravens can remember the closeness they had with others for three years.

Ravens have long-term memory.
Credit: Markus Boeckle

In daily life we remember faces and voices of several known individuals. Similarly, mammals have been shown to remember calls and faces of known individuals after a number of years. Markus Boeckle and Thomas Bugnyar from the Department of Cognitive Biology of the University of Vienna show in their recent article, published in Current Biology, that ravens differentiate individuals based on familiarity.

Related Articles


Additionally, they discovered that ravens memorize the closeness of a relationship and affiliation.

Until now it was unknown whether ravens could remember the closeness of a relationship based on former positive or negative interactions. In response to calls of formerly known individuals ravens not only increase the number of calls but also change call characteristics dependent on whether they hear former "friends" or "foes." This suggests that ravens remember specific individuals at least for three years.

The ability to change call characteristics is especially interesting: In case they hear a "friendly" individual they respond with a "friendly" call, whereas when listening to a "foe," they exhibit lower frequencies with rougher auditory characteristics, an effect already described for other animal species.

Ravens respond to calls from previously unknown individuals with even lower and rougher calls and thus try to increase the acoustic perceivable body-size -- akin to humans, where larger people have lower voices than smaller ones and angry humans use rougher-sounding voices. While it was known that mammals change their voices based on the relationship they share with others, the researchers were now able to show for the first time that also birds change their calls according to relationship quality.

The duration of the memory is beyond the previously estimated ability for birds and the ability to remember the closeness of a relationship has been shown for the first time in ravens.


Story Source:

The above story is based on materials provided by University of Vienna. Note: Materials may be edited for content and length.


Journal Reference:

  1. Markus Boeckle, Thomas Bugnyar. Long-Term Memory for Affiliates in Ravens. Current Biology, 2012; DOI: 10.1016/j.cub.2012.03.023

Cite This Page:

University of Vienna. "Ravens remember relationships they had with others." ScienceDaily. ScienceDaily, 19 April 2012. <www.sciencedaily.com/releases/2012/04/120419132558.htm>.
University of Vienna. (2012, April 19). Ravens remember relationships they had with others. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2012/04/120419132558.htm
University of Vienna. "Ravens remember relationships they had with others." ScienceDaily. www.sciencedaily.com/releases/2012/04/120419132558.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Christmas Kissing Good for Health

Christmas Kissing Good for Health

Reuters - Innovations Video Online (Dec. 22, 2014) Scientists in Amsterdam say couples transfer tens of millions of microbes when they kiss, encouraging healthy exposure to bacteria. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Brain-Dwelling Tapeworm Reveals Genetic Secrets

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Reuters - Innovations Video Online (Dec. 22, 2014) Cambridge scientists have unravelled the genetic code of a rare tapeworm that lived inside a patient's brain for at least four year. Researchers hope it will present new opportunities to diagnose and treat this invasive parasite. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins