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September 29 2012

MerelyGifted
18:07

April 20 2012

09:05
3469 e108

…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. Additionally, they discovered that ravens memorize relationship valence and affiliation. …

… 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 and rougher 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 – also in humans larger people have lower voices than smaller ones and angry humans rougher 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; the ability to remember relationship valence has been shown for the first time in animals.


Via Ravens remember relationships they had with others by way of dear MSiegel

Reposted bysmoo smoo

March 10 2011

00:53

Introduction to crows.net

Crows.net

The Language and Culture of Crows

A site for cooperative research on the language and culture of the American crow, Corvus brachyrhynchos.

Fantastic site!

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