Tell Crows and Ravens Apart — Corvid Clarity

October 28, 2023March 13, 2024 / The Urban Nature Enthusiast / 22 Comments

How can you tell if it’s a crow or a raven?

This question often comes up in my email and social media so I thought I’d re-post this blog from a few years ago.

I was partly inspired by having coincidentally photographed both a crow and a raven in very similar poses and both against a red background just recently.

I thought it was fun to see the two images together.

Crow against a red garage wall in an East Vancouver alleyway

Raven against a red roof at a ski hill in North Vancouver

The two pictures highlight a couple of the most obvious differences between crows and ravens. You can see that the raven’s beak is a lot heftier than that of the crow. The raven also has that rather opulent display of throat feathers

There are a lot of excellent resources to help out with learning to tell ravens from crows (more on these later) — but in this post I’m working mostly from my own observations, made from over a decade of daily corvid-watching.

TAIL SHAPE

First of all, if you just catch a glimpse of a crow/raven mystery bird flying over you — check out the tail shape.

The raven’s tail feathers form a diamond shape, while the crow’s tail is in more of a flat-edged fan arrangement.

Crow and Raven Flying Silhouettes

Raven in Flight

While you’re watching them in flight, note if they’re doing more soaring or flapping.

Raven are more prone to using the air currents for long, effortless glides, while crows tend to rely more on flapping.

That being said — I have seen crows having a lot of fun on windy days, just riding the gusts of wind like a roller coaster.

THROAT FEATHERS

As I mentioned earlier, the raven is distinguished by a rather magnificent arrangement of throat feathers — something like an very luxurious cravat.

Crows, while also (of course) magnificent in their own way, are less generously endowed in the cravat department. Sometimes, when they fluff up as part of grooming, or to look fierce, their throat feathers can look a bit “raven-y” — but generally they’re smoother.

Fluffed-up crow in “fierce” mode.

Normal chest feathers on a relaxed crow (Bongo)

RELATIVE SIZE

Having been unable to persuade either species to remain still while I measure them, I’ve had to rely on information gleaned from the internet here.

Ravens, I’ve read, measure up to 67 cm (26 inches) long with a wingspan of up to 130 (51 inches). Their smaller relatives, the crow are about 46 cm (18 inches) long and have a wingspan of around 95 cm (36 inches).

Unless you happen to see them sitting side by side at an equal distance from you, it’s difficult to make an identification based on size alone.

In this case the two birds were more or less the same distance away, although the crow was a bit higher up in the tree, probably making him look a little smaller.

Raven and two crows — here the crows are considerably further away, making the scale deceptive.

BEHAVIOUR

If you see a large black corvid being mobbed by one or more smaller ones, you can pretty much guarantee that the big one is a raven and s/he is being harassed by the crow Neighbourhood Watch committee.

Crows Mob Raven

In spite of their family connections, ravens will blithely raid crow nests for a tasty egg snack — putting them firmly on the crows’ “naughty list” along with eagles, hawks, racoons, squirrels, coyotes, cats and etc.

Crow Raven Pursuit

SOCIETY

Both crows and ravens normally mate for life.

photograph of a raven pair standing head to head

A raven couple

Crow couple, Echo and Earl

In the city, crow pairs tend to claim half a block or so as their territory. They spend most of their daylight hours there and will usually chase off other crows who cross the invisible crow boundaries.

At night, however, the Vancouver crows turn to safety in numbers as protection against dangers that lurk in the dark. Just before dusk the crows gather in larger and larger groups as they all fly, sometimes looking like a river of crows, to the roost at Still Creek. It’s “the more the merrier” as they congregate around the roosting area, with lots of loud calling before they all settle in for the night in tree branches or on Hydro wires or buildings.

Ravens don’t form roosts in our area, but they do seem to gather in larger groups when there’s a good food source to be shared. Not always, but occasionally, the area around the local ski hill parking lots have lots of ravens hanging around together.

It’s not the size of the crow roost by any means, but it does seem to be a social occasion.

It’s on days like these I’ve witnessed the ravens playing with snowballs and engaging in other playful activities. It always seems to be that they gather when there are a lot of humans up at the ski hill, dropping food and leaving sandwiches unattended. A sunny Spring Break ski day seems to draw a lot of ravens to the parking lot as it did the day of the Raven Soap Opera in Two Acts.

I have read that in other parts of North America and Europe, ravens do form roost-like communities — although these of a more temporary nature than the crow roosts. The Still Creek Crow roost in Burnaby, for example, has been a crow meeting place since the 1970’s!

SOUNDS

By far the easiest way to tell a crow from a raven is by the sound they make.

Crows caw and ravens have more of a croaking sound. But that’s a great simplification of their complicated call sets.

Here are just few examples to help you tell them apart:

CROW ALARM CALL

This is probably the most common corvid you’ll hear in a city. This example is Marvin and Mavis expressing their displeasure at our cat being out on the deck.

CROW “RATTLE” CALL

This is another crow call, less often heard because it’s a softer, more intimate form of crow-munication.

RAVEN CALL

This seems to be the most common raven call I hear, both in the city and in the mountains.

RAVEN KNOCKING CALL

This beautiful sound is more like the crow’s rattle call – more subtle and melodic – almost like water dripping or a hollow bamboo tube being tapped.

RAVEN RECITATION

In this clip a raven seems to be performing a jazz concert of different subtle sounds — an example of how complex corvid language is.

ATTITUDE

When it comes to confidence and attitude, ravens and crows have so much in common.

Both are highly intelligent birds — you can almost hear the cogs of their brains whirring as they work out myriad “risk/benefit” calculations when they come close to humans.

It’s really not surprising that both crows and ravens are often characterized as tricksters in stories and legends.

Crow Raven Dancers

OTHER RESOURCES

Kaeli Swift – Corvid Research

One of the best places to find out all about corvids is on Kaeli Swift’s awesome blog Corvid Research. Kaeli covers every corvid related topic you can think of in her posts. You can also follow her on social media and participate in her skill-building weekly Crow or No? contests.

John Marzluff

His books In The Company of Crows and Ravens and Gifts of the Crows, are just full of interesting information on both of these amazing birds.

Bernd Heinrich

For lots of information and studies on raven behaviour, check out Heinrich’s Ravens in Winter and Mind of the Raven.

LINKS

Audubon: How to Tell a Raven From a Crow

Cornell University Birdlab : Crows and Ravens by Kevin McGowan

Nesting Notes 2023

April 17, 2023April 16, 2023 / The Urban Nature Enthusiast / 11 Comments

It’s Spring-time in the city.

The plum blossoms have come and gone and the cherry blossoms are out, albeit soaked with rain.

Even more exciting — crow nesting season is in full swing!

Even MORE exciting than that — a pair of crows seem to be building a nest in our big two storey cedar hedge. This would be the first time we’ve had a crow nest this close to the house!!

(Side note: it also happens to be right outside of our bedroom window so check in with me again in about six weeks and see if I’m still this excited.)

It started about ten days ago when we arrived home just in time to see this crow on the neighbour’s chimney …

… take off and do a graceful U-turn directly into our hedge.

At first I thought a hedge is a poor nesting site choice, but having realized how hard it is to actually see it, I’m reconsidering. It’s at least ten feet off the ground so reasonably inaccessible for raccoons, and low for eagle raiding. Let’s hope so anyway, as an eagle plunging into the hedge outside our bedroom would be excessively thrilling for all concerned.

This, taken with a zoom lens from top of the porch steps is the only very partial view you can get of the nest. You can see a flash of pink in there where they’ve used a plum blossom branch for construction. From the outside of the hedge, aside from a few stray twigs, there’s nothing to see here folks … just move along.

For reference — a crow’s nest I found on the ground a few years ago, post-nesting season. You can see it’s made up of a wide variety of materials, mostly twigs, moss and bark, but also human-made items such as packing fluff and zap straps

Over the next few days I watched the soft furnishings going into the hedge nest — mostly collected from a new house being landscaped across the street. Lots of bark and dry grass and even bits of old cardboard were being snapped up by the décor conscious couple.

I’m trying not to investigate the nest too much as I don’t want them to change their mind and build elsewhere. They may have done so already, as I’ve noticed crows often build one or more quite elaborate practice or decoy nests before finally settling on the real deal.

I HAVE noticed one them almost always on a branch or roof within crows-eye-view of the hedge, so fingers crossed.

One of the Hedge Nesters keeping an eye on things from a nearby plum tree

A complicating factor — these two are not Marvin and Mavis, but another pair of crows who have claimed the front part of our house. More on the complicated “house crow” situation in another post.

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Benjamin Beats The Odds

March 17, 2023March 16, 2023 / The Urban Nature Enthusiast / 11 Comments

This is the last in my series of City Crow Stories updates for now, and concerns Ben, the crow with one very badly bent foot.

The stories I tell about crows are true and, therefore, do not always come with happy endings. For many months I assumed that Benjamin’s story was along the lines of: “spirited but injured crow tries his hardest to beat the odds and stay alive, but fails in the end.”

I took the photograph of Ben seen below on May 8, 2022. He’d managed to make it through most of the fractious and competitive nesting season, without seeming to have a settled territory of his own. He always seemed to be with several birds so I couldn’t even really tell if he had a mate who had his back, as Mabel did for George.

After the long damp spring came an even longer, hot, dry summer which lasted well into October. Autumn was barely sputtering to a start when she was rear ended by a wildly impatient Winter. All of this happened without a single sighting of Ben.

As I thought about writing my City Crow updates, I envisioned having to share the sad news of both Mabel and Ben’s disappearances.

It was, then, a bit of an early holiday gift to have him just suddenly pop up again. He came surrounded by a rowdy gang of other, able-footed crows and walked right up to me as we’d seen each other only the day before.

The return of Benjamin, December 2022

I did, of course, ask him where he’d been, as is only polite. He answered me in a series of caws that could have been an animated recounting of his epic adventures — or he may just have been asking for peanuts.

I guess we’ll never know …

Benjamin, January 2023

February 2023

The story of Benjamin continues to unfold, with random appearances every few weeks, just to let me know he’s still out there, doing his best.

The stories of ALL the crows are constantly evolving. If I only had the time, I could write a daily post relaying all the small things I notice, the beautiful moments and the never ending puzzle of the crow world. The crows in your neighbourhood are just as fascinating as the seven I wrote about, and I strongly encourage you to tune into your own local crow soap operas.

Thanks so much for following along with these stories and to the many of you who purchased copies of my book. Only four copies remain on my shelf, which is pretty amazing for a book that was self published and un-advertised.

Crows are excellent story tellers, so I think it was a good decision to mostly hand the narrative reins over to them.