The Cornell Lab Bird Academy › Discussion Groups › Anything but Common: The Hidden Life of the American Crow › Life in a Flock
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- Have you noticed any foraging flocks in your area? What time of year did you see them? Describe the habitat. Could you estimate the size?
- Have you seen other birds form large flocks? Do you know what they were?
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1. I will keep an eye out for foraging crow flocks. I would expect that farm fields in the fall are good places to se this.
2. I have sen American Robins from large flocks in the pastures near my house in late winter/early spring. I have shade large flocks of Cedar Waxwings come to my yard in early spring to feed on holly berries. We get the occasional large flock of blackbirds and grackles as well. I’ve seen huge flocks of mostly Red Winged Blackbirds, but including other blackbirds and grackles , come in to roost at sunset in a man made wetland managed by the Clayton County Water Authority. That was in late fall, but probably happens at other times, it’s just that public access there is limited. -
I have many crows in my yard daily. We have had a family live here for the past 15 years, at least. I had peanuts out a few days ago and it was great to see the interaction between a smaller one and an adult. The adult was poking the younger one when the younger one was also trying to grab peanuts. After about a minute or so the older one stepped away let the younger one grab some peanuts and then they flew away and let the younger one just keep munching away.
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1. I haven't seen crows in foraging flocks, but I will keep an eye out (though I guess it's the wrong time of year right now for a big flock...)
2. I've seen large groups of cedar waxwings and of robins in my yard (30+). I've also seen a big group of egrets and herons that roost in big plane trees nearby. It's an amazing sight. -
yes , in the fall we have large flocks of starlings in Rhode Island .
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1. I didn't realize crows form such large foraging flocks. There are cornfields not far from where I live. Maybe I should visit them on a crow-observing excursion before the breeding season begins.
2. I've observed large flocks of blackbirds, numbering probably in the hundreds of individuals, assembling in the trees in October. I've heard the racket they make, but I haven't closely observed them visually. I assume they're forming a mixed flock, but I don't know that with certainty.
In the last 15 years or so, I have been graced by the presence of Eastern Bluebirds once the weather turns inclement in late fall/early winter. During the 2025 Great Backyard Bird Count, they numbered as many as 21 individuals. Obligingly they perched on utility wires behind my house, enabling me to get an accurate count.
The downside of the presence of the bluebirds is that hordes of European Starlings follow in their wake. During the same GBBC, I estimated upwards of 60 starlings lurking in the trees in the neighboring yard. They hog all the seed, suet, and mealworms and make an absolute mess, if you know what I mean. They also intimidate the smaller birds, and even the occasional similarly sized American Robin (1 against 60--hardly fair). I often stand inside my patio door and act as a "scarestarling" when they descend en masse onto my patio. They drive me nuts, and I believe they can sense my hatred of them.
Sometimes in winter a sizable flock of American Goldfinches will visit in search of seed. I've counted as many as three dozen on my patio at once. They avoid the goldfinch feeder (!), preferring the ordinary tube feeder and simply ground-feeding. They are usually accompanied by a score or more of House Finches. I don't know whether the goldfinches and House Finches form a mixed flock, or they simply show up at the same time in a place where they find an abundant and often replenished supply of food.
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During the winter, I have seen large flocks of mourning doves, blue jays, and European starlings.
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Cool! This was the first year that I had Doves on my porch every day fattening up and gorging on food throughout the winter. To watch them be territorial with blue jays is something!
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1. I wish I have. I’ve only seen small family groups foraging at the compost or under the bird feeder.
2. Though not as large as some bird flocks can be, I regularly see flocks of wild turkeys walk through the yard. The largest flock I saw consisted of 16 turkeys. -
We have a small group of American Tree Sparrows that forage at our feeders regularly in winter.
Otherwise, it is Canada geese and swans that flock up on the local lake, more in the winter. -
I have seen large flocks of dark eyed juncos during the winter.
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1: I mostly see flocks in the winter or during migration times. The flocks of crows I've seen have been from 3-12 individuals. They flew over wooded pine forest.
2: Other birds I've seen in flocks include Sandhill Cranes, Canada Geese, Red-winged Blackbirds, Pygmy Nuthatches, European Starlings and other species part of mixed foraging groups. Gulls and ducks are often in large groups too. -
I have seen from time to time a flock of crows in my neighborhood in fact they have been to my bird feeder. I have seen them in the fall and recently in the winter. It was a small size roughly 8-12. Now I will have to pay more attention the n next time a flock of crows come in and watch them more closely.
The only others I have seen in a flock are Canadian geese and sandhill cranes. -
It's hard to say if the groups of crows I've seen, other than the family that hangs out in my neighborhood, are a flock or a family. I am always driving when I encounter them and am driving too fast to safely observe them. However, I think it might a foraging flock. They gather in the agricultural fields, both crops (hay) and cattle. They are more abundant during the fall and winter months. They especially love to hang out in the hay fields after the farmers have baled the hay and the grass is really short. I imagine it's easier to find food. Hawks also love this opportunity.
I have seen Red-Winged Blackbirds form large flocks as well as Sandhill Cranes. -
My yard has been visited by large flocks of Common Grackles which often include Red-Winged Black Birds.
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1. There is a place where crows forage in a large group on a hiking trail nearby. It is interesting to know that even though crows are there much of the time, it is different crows, not the same bunch.
2. I have seen starlings and grackles in large flocks. -
1. I have seen what I thought was 2 distinct foraging flocks in my area. Now I'm not so sure. One flock hangs out by the small lake and the other is closer to town in the park behind the large grocery store. The groups seem larger in the late fall and winter. At the moment, in November, I would estimate that the size of the lake group is about two dozen and the size of the town crows is about three or four dozen. At night, both groups seem to gather, call out, and fly southeast to their roost together.
2. A flock that I often see at my feeders, especially in warmer weather are the band tailed pigeons. The large flock will clear out my feeder in a couple of minutes and knock over a few things in the process. I live about 5 miles "as the crow flies" to a large bay and about 1o miles the other direction to the ocean so I often see larger flocks of gulls. -
I've heard recently that there are some huge flocks of crows in a specific neighborhood of Los Angeles, hoping to go see them soon. It's October now they've been seen for about a month.
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1. I often see crows gathering at river channels and golf courses, not necessarily to forage, sometimes just hanging out before flying off to their evening roost. Their flocks can range in size from hundreds to thousands.
2. In Southern California, when it comes to large flocks other than crows, I think of Canada Geese during breeding season and then gulls year round. Along the 1.5 mile-long jetty or breakwater at Dana Point Harbor, you can often see large groups of Brown Pelicans and gulls resting on the rocks. I estimated 600-1000 pelicans and 300-500 Western Gulls during two evening visits in late spring several years ago. -
1. Yes, I have. I usually see them in winter, which makes sense, because in winter, it is not breeding season. In the winter, the average temperature is about 65, with mountains nearby. I would say, at their largest, the murder had about 125 crows in it.
2. I have. I believe the birds I have seen in large flocks were most likely European Starlings. -
1. I thought there was more cohesion to flocks, this is fascinating! I see groups of 15-50 or so along Southeast Alaska's shores foraging in the intertidal zone, mostly in the fall and winter.
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I live in the middle of the province of BC. In the winter on our college campus we can see groups as large as 50-60. We also have a Bald Eagle pair, and some times I think a mated pair of Ravens, that seem to forage together, or sometimes play? They also move the Eagles out at time, but not always.
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In New Jersey I see small flocks 8-12 almost every I go birding pretty much year round. I work on a military base and almost every pocket I go birding I will see crows. There are also two Ravens you can see on any given day. I see really large flocks of Starlings, common grackles and red wing blackbirds.
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I live in the Portland OR area, so I get to see groups of crows flying from their territories around my neighborhood to downtown Portland for an evening roost.
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I recently saw a large flock foraging in a field while I was in NJ. Near me in NYC, I don’t often see flocks of high numbers, but instead see smaller groups (maybe 25-30 max). I do see them intermix, often with starlings and gulls.
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There’s an outdoor amphitheater that puts on indie concerts. My favorite part of that venue is the huge flock of crows flying overhead-hundreds and hundreds. I’m going this weekend and already looking forward to observing them! I suspect they roost nearby.
We have roosts of Amazon parrots and parakeets in my area. In the winter as many as 2000 parrots will fly overhead-it’s deafening and also really cool. Easy for me to say since I’m not getting awoken at sun up every day. They’ve actually been suffering from violence over the last few years.
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