Live data from Hacker News

How to tell a raven from a crow (2012)

audubon.org

91–100 of 104 posts

Re: How to tell a raven from a crow (2012)

#91
post #81
post #76

Earlier quoted context omitted.

Ravens are apparently one of the smartest animals.[1] [1] https://news.nationalgeographic.com/2017/07/ravens-problem-s...

Also crows: https://www.youtube.com/watch?v=cbSu2PXOTOc

Seems like the crow is "just" solving the problems independently (with which it has previous experience), rather than thinking multiple steps ahead.

Re: How to tell a raven from a crow (2012)

#92
post #83

Crazy to see this posted today. Last night my wife and I were on a reservation in Arizona and watching the birds. She googled this very topic. Then when I looked at HN today, here it is! I showed it to her and the first thing out of her mouth was, “Is Facebook listening to me?” Then I had to explain that HN is human-powered and the chances of Big G and Facebook and HN sharing data is pretty close to zero.

I visited the tower of london yesterday and bought a raven mug, talk about coincidences

[deleted]

Re: How to tell a raven from a crow (2012)

#93
post #32

Have you ever exchanged a look with a stranger and their expression was such that you immediately got a deep impression of their inner life, of their humanity, and felt a connection? That happened to me with a raven, while we were both enjoying a stunning view of a sunset at Petrified Forest National Park. It was a large, old, rumpled, wise seeming creature. Surely that environment primed me for the experience. The m…

Scott Alexander has a good post on bird intelligence here: https://slatestarcodex.com/2019/03/25/neurons-and-intelligen... Though they have much smaller brains, there is evidence to suggest that their brains are 10x more computationally dense.

When talking about brain power like this, I don't often see people mention the costs of simply driving a more complicated body. Birds are physically simpler than humans (no hands, fairly simple feet/legs) so maybe they just spend less overhead on motor skills and associated control?

Re: How to tell a raven from a crow (2012)

#94
post #79

Earlier quoted context omitted.

This is a hooded crow hammering / trying to kill what probably thinks is a prey. Seems more frustrated than happy. The easiest crow to identify in Europe, being gray and black.

How about these? When they roll on their backs down a snowy slope, are they playing? https://www.youtube.com/watch?v=h7GmYJnUtsY

Killing mites on their body is a common explanation or maybe it's fun.

How about this video, are they playing? https://m.youtube.com/watch?v=C59YIwMcg3Y

Re: How to tell a raven from a crow (2012)

#96
post #78

Earlier quoted context omitted.

So you adopted a dog. How did you go about buying all the things you need when you suddenly have a dog? Stores? Online? Amazon? Did you use a credit card? Did you research dog food? Post on Facebook or Twitter about how you were getting a dog?

I didn't actually adopt a dog. I merely spoke about the idea of doing so to a friend.

Oops, my bad on the misread.

Re: How to tell a raven from a crow (2012)

#97
Researchers for the Massachusetts Turnpike Authority found over 200 dead crows near greater Boston recently, and there was concern that they may have died from Avian Flu. A Bird Pathologist examined the remains of all the crows, and, to everyone's relief, confirmed the problem was definitely NOT Avian Flu. The cause of death appeared to be vehicular impacts.

However, during the detailed analysis it was noted that varying colors of paints appeared on the bird's beaks and claws. By analyzing these paint residues it was determined that 98% of the crows had been killed by impact with trucks, while only 2% were killed by an impact with a car.

MTA then hired an Ornithological Behaviorist to determine if there was a cause for the disproportionate percentages of truck kills versus car kills.

The Ornithological Behaviorist very quickly concluded the cause: when crows eat road kill, they always have a look-out crow in a nearby tree to warn of impending danger.

The scientific conclusion was that while all the lookout crows could say "Cah", none could say "Truck."

Re: How to tell a raven from a crow (2012)

#98

Here's a very cool Google Creative Labs experiment that used tSNE to organize thousands of bird chirps/songs/calls. The result is an interactive map that groups similar bird sounds (click/tap to play any of the sounds): https://experiments.withgoogle.com/ai/bird-sounds/view/ source code: https://github.com/googlecreativelab/aiexperiments-bird-soun...

That is really cool. Also, if you click and drag you get the sound of a roller coaster.

Re: How to tell a raven from a crow (2012)

#99
post #76

Earlier quoted context omitted.

That's a sure sign you are watching ravens, not crows. Ravens can play together in the air in ways crows never do.

Ravens are apparently one of the smartest animals.[1] [1] https://news.nationalgeographic.com/2017/07/ravens-problem-s...

Corvids in general.

The New Caledonia Crow is getting a lot of study for its puzzle-solving abilities.

Re: How to tell a raven from a crow (2012)

#100
post #83

Crazy to see this posted today. Last night my wife and I were on a reservation in Arizona and watching the birds. She googled this very topic. Then when I looked at HN today, here it is! I showed it to her and the first thing out of her mouth was, “Is Facebook listening to me?” Then I had to explain that HN is human-powered and the chances of Big G and Facebook and HN sharing data is pretty close to zero.

I visited the tower of london yesterday and bought a raven mug, talk about coincidences

I was expecting you to write that you were then served ads for coffins.
Post reply on HN