Warning: INSERT command denied to user 'dbo256360593'@'' for table 'watchdog' query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:403:\"INSERT command denied to user 'dbo256360593'@'' for table 'captcha_sessions'\nquery: INSERT into captcha_sessions (uid, sid, ip_address, timestamp, form_id, solution, status, attempts) VALUES (0, '011af5a28b456a12320aec5d87c94a1c', '', 1591440542, 'user_login_block', '12d285e51964c1773be6ee61ca2fe4f7', 0, 0)\";s:5:\"%file\";s:88:\"/homepages/45/d175009339/htdocs/tahoetowhitney.org/sites/all/modules/captcha/captcha.inc\";s:5 in /homepages/45/d175009339/htdocs/tahoetowhitney.org/includes/database.mysqli.inc on line 134
BIRD SOPHISTICATION: Raven Communication | High Sierra Backpacker

BIRD SOPHISTICATION: Raven Communication

Alex Wierbinski's picture

By Alex Wierbinski - Posted on 15 March 2018



Raven Communication

'Haa haa haa': Raven food calls disclose their age and sex,
BioMed Central, March 12, 2018.

"The majority of previous research on call characteristics in ravens focused on recognition of known individuals. However, to our knowledge, no experiments have tested for features in food calls that might provide ravens with information about unknown individuals."

"Our results suggest that ravens have the necessary variation in their food calls and the cognitive means to distinguish between specific classes of sex and age (class-recognition). Thus, we show for the first time that ravens can potentially use food calls to tell other ravens apart, according to these categories."


Crow Nation

The local crows are smart. They travel in groups and break up into sub-groups, with each crow appearing to have both traits in common with the others, and their own unique characters. They know what to expect of each other in dynamic situations, and are not shy about expressing their satisfaction or dissatisfaction with their murder-mates.

One of their rendezvous spots near me is along the peaks of the heavy terracotta Spanish tiles making up the ridge and the ample wood gutters along the eaves of the massive house next door. That's maybe thirty feet in a direct line of sight from my desk. Besides being a meeting and safe observation spot, the crows also harvest the insects that live in the gaps between and along the edges of the tiles.

I once watched an old crow train a young crow how to pick those bugs. It was hilarious. The old crow was done with sharing! That stubborn young crow wanted to be fed. The old crow won, and the young crow finally, resentfully, started poking, prodding, and herding its own insects into its mouth!
I like the crows, and my proximity appears to make me what they consider to be a "neutral" part of their environment. Those same crows also frenquent a tree I sit under at another location about a half-mile from the Spanish roof. At the trees a bunch more crows show up than ever do on the roof, making me consider the roof a "neighborhood" type of hang-out for the local gang, while the trees are where the whole "community," where different groups come together to interact. Both spots are quite entertaining, each with its own "tenor," but my favorite crow activity is watching them crack nuts on the streets between cars.

Crows are not only smart, but they know they are intelligent. Maybe I'm predijuced, but pidgeons and seagulls appear to be idiots compared to the crows. The raptors are not as smart as the crows, not nearly as stupid as the gulls and pidgeons. It appears to me a lot of raptor intelligence is, "physical," in that the raptor's brain power is focused towards analyizing speed, trajectory, wind, while anticipating prey movement in the context of a power-dive. That's a certain kind of intelligence. A physical intelligence, tailored to its task.


That "tailored to task" approach may help explain the difference between cat & dog brains.

Brain News: Dog vs Cat Brains, Two Different Approaches to Life


Natural Intelligence

Ravens ignore a treat in favor of a useful tool for the future

The trouble with being a handsome bird

Smart Chickens

Scientists capture video of dolphins risking death to eat octopus




Raven Couple in Yosemite, JMT above Half Dome



All Bird News




March 2018 News of Man & Nature




Nature News


Climate Destruction News



Bee News

Bear News

Spider Forum

Bird News

Small Mammals

Frogs and Reptiles

Butterfly News


Health and Fitness

Mountain Safety

Mosquito News

Female Trail

High Sierra History


Astro-Phys, Space, & Science News

High Sierra Geology News

Fish, Oceans, & Water News



All High Sierra News





bird sophistication raven communication calls disclose age sex


Powered by Drupal, an open source content management system

Latest News: RSS FEED

Syndicate content

Support Tahoe to Whitney

The Tahoe to Whitney Trail Guide and Magazine are walked, written, funded, and supported by my efforts, with the help of kindred spirits and my sister.

We offer valuable Trail Guide, Skills, Weather, News and Analysis.

My goal is to get you out to see your natural and social potential. Help me keep this unique resource accessible and expanding towards its potential. We've a lot of miles to cover ahead...

If you feel these efforts are valuable, I'm cordially inviting you to support them, here:



I am currently working towards publishing the completed guide between Tahoe & Yosemite as an e-book, while converting this "blog" to a fine magazine format. You will like the results! Help Tahoe to Whitney reach its potential!


Why Support Tahoe to Whitney?
Mission Statement

Warning: INSERT command denied to user 'dbo256360593'@'' for table 'watchdog' query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:413:\"INSERT command denied to user 'dbo256360593'@'' for table 'accesslog'\nquery: INSERT INTO accesslog (title, path, url, hostname, uid, sid, timer, timestamp) values('BIRD SOPHISTICATION: Raven Communication | High Sierra Backpacker', 'node/1678', '', '', 0, '011af5a28b456a12320aec5d87c94a1c', 338, 1591440542)\";s:5:\"%file\";s:87:\"/homepages/45/d175009339/htdocs/tahoetowhitney.org/modules/statistics/statistics. in /homepages/45/d175009339/htdocs/tahoetowhitney.org/includes/database.mysqli.inc on line 134