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The answer to "A group of crows is called a..." is a murder. That's the collective noun. One murder of crows. Simple enough on trivia night, but it's a bit more complicated when you actually run into one. I'm not going to dive deep into the etymology here because nobody needs a lecture about 15th-century English gentry terms. The word "murder" for crows comes from medieval times, and yes, it sounds dramatic because it was meant to be. Crows are smart birds, they gather in large numbers, and people have always found that unsettling. The naming convention stuck around in ornithology and folk usage even though most bird groups have gentler collective nouns like "flock" or "gang." You'll occasionally see "wake" thrown around as an alternative term. It's less common and honestly carries the same grim vibe. Both terms persist in nature writing and folklore, but "murder" is the one you'll find in actual field guides and ornithological references. If you're writing something where accuracy matters, stick with murder.
One thing nobody warns you about is the scale. People picture maybe six or eight crows when they think of a murder. I've seen groups of over two hundred birds in suburban areas during winter. They roost communally and the numbers get absurd. What looks like a small gathering from a distance can be a massive congregation once you notice the tree line moving. The behavior of a murder also tells you something about their intelligence. These aren't just random clusters of birds. They coordinate. They share information about food sources and threats. I spent an afternoon watching a murder in a parking lot near my house last November. They took turns investigating a discarded pizza box while the rest kept visual contact. One bird would do a quick check, fly back, and another would move in. It wasn't chaotic. It was structured. That kind of coordination is why they're considered one of the smarter bird species. If you're dealing with a murder problem on your property, which I've had to deal with more times than I'd like to admit, here's what actually works. Crows are extremely associative learners. If they figure out that one area consistently provides food, they remember it for years. The workaround is simple but annoying: remove the attractant completely. I had a situation where a murder had claimed a dumpster behind a restaurant and they'd trained other crows in the area to show up. Simply closing the dumpster flaps and switching to secured containers did the trick within three weeks. No netting, no repellents, no noise machines that lose effectiveness after a few days. Just making the location unrewarding.
A deeper truth about crows that most people miss is that they hold grudges. I know that sounds like an exaggeration, but it's documented. Researchers at University of Washington proved this with masked researchers. Crows that were handled by someone in a specific mask called other crows over to scold that person. Years later, those same crows still reacted negatively to the mask. I witnessed something similar when a crow repeatedly dive-bombed a specific delivery driver at my old house. We eventually figured out that driver had accidentally hit a nest with his ladder years prior. The crow remembered. The whole neighborhood murder remembered. The driver switched routes. The main downside of working with or around crows is that they adapt too quickly. Bait traps, scare devices, habitat modification — most methods only work for a short period. Crows will test novelty behaviors. They'll send a few bold individuals to investigate before the whole group commits. This makes them nearly impossible to repel permanently without sustained effort. The only reliable long-term solution is exclusion or making the environment genuinely unwelcoming through consistent removal of food and nesting sites. If you need to identify a murder in the wild, look for the V-shaped flight formation. Juveniles have darker brown tips on their feathers and less glossy plumage than adults. Adults have that iridescent blue-black sheen, especially visible on the wings in direct sunlight. The call is distinct too — that harsh "caw" is different from ravens, which have a deeper croaking sound. If you hear something that sounds almost like it's laughing, that's a crow being a crow.
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