7 Red Birds in Colorado
A practical guide to Colorado's most striking red species — from your backyard to the mountain forests
So I'll be upfront — I didn't really notice red birds until a House Finch landed on my deck railing one morning and just sat there. Bright rosy head, casual as anything. After that I started paying attention. Turns out Colorado has a solid lineup of red birds, and a lot of them aren't as hard to find as you'd think.
This guide covers the seven species most worth knowing. Whether you're just starting out with Colorado bird identification or trying to tell your finches apart, hopefully this saves you some of the confusion I went through. If you're into other colorful birds too, check out winter birds in Texas or the blue birds of North Dakota — totally different worlds out there.
What Are the Most Common Red Birds in Colorado?
Before jumping into each species — the most common red birds in Colorado you'll realistically encounter are House Finch, Cassin's Finch, Northern Cardinal (eastern Colorado), Pine Grosbeak, Red Crossbill, Broad-tailed Hummingbird, and Purple Finch. The House Finch wins the frequency contest by a wide margin. If there's a red bird at your feeder right now, that's probably what it is.
1. House Finch — The Backyard Regular
What It Looks Like
Males have rosy-red on the head, chest, and rump — the exact shade varies. Some are more orange, some a deeper red. That variation comes from diet; more carotenoids in food means richer color. Females are plain streaky brown. Both sexes have a streaky belly, which is a useful field mark when comparing to similar finches.
Where to Find Them
Everywhere, honestly. Suburbs, farms, city parks, mountain towns. These backyard red birds in Colorado adapted to humans extremely well and are year-round residents. They don't migrate. January feeder? House Finches. July camping trip? House Finches. Learn this one first and the others become easier to spot by contrast.
Quick tip: House Finches are social. They often come in small groups to feeders. Black oil sunflower seeds work great for attracting them.
2. Cassin's Finch — The Mountain Version
How to Tell It Apart
This is where people get tripped up. Cassin's looks a lot like a House Finch, but there are real differences. The male has a sharper, brighter red cap — more defined, like a little crown rather than color bleeding down the whole head. The chest color is paler and cleaner. Bill slightly longer and more pointed. Females show finer, crisper streaking and a more distinct facial pattern than female House Finches.
According to Wikipedia's Cassin's Finch entry, the species is named after 19th-century American ornithologist John Cassin — one of those classic bird naming stories.
Where to Find Them
Mountains. Ponderosa pine, mixed conifer, subalpine forests — generally from 6,000 feet up. Rocky Mountain National Park, the Pikes Peak region, and pretty much any mountain town in the state are good bets. Some birds move to lower elevations in winter when food gets scarce up high. Check out this feeder guide for practical tips that work for mountain finches too.
3. Northern Cardinal — The Classic
If you grew up east of the Rockies you know this one immediately. All-red male, black mask, crest, thick orange-red bill. It's the most recognizable red bird species in Colorado — even people who don't watch birds know what a cardinal looks like.
In Colorado, cardinals live mainly in the eastern plains and along river corridors. They've been slowly expanding westward for decades. Cities like Pueblo, Colorado Springs, and eastern Denver suburbs have established populations now. Year-round residents — they don't migrate, so if they're in your area, they're there all winter too. That red against snow is genuinely something.
Worth knowing: Female Northern Cardinals actually sing, which is unusual. Both sexes call year-round. That loud whistled "cheer cheer cheer" in your yard? Could be either one.
4. Pine Grosbeak — A Real Winter Treat
Pine Grosbeak is one of the more exciting finds on this list. Large finch — noticeably bigger than the others. Males are rosy-red with gray wings and white wing bars. Stocky, round-headed, thick bill. They look almost like a plump, slow-moving finch that hasn't heard it should be nervous around people.
They're irruptive — meaning they show up in bigger numbers some winters when food is scarce further north, and in other years you barely see any. Found in higher elevation spruce-fir forests, usually November through March. When they do appear, they tend to be surprisingly tame. Small flocks feeding on berries in a snowy mountain forest. One of those moments that makes winter birding worth the cold.
For a sense of how other states have their own signature species, Illinois blue birds make a nice comparison.
5. Red Crossbill — The Weird One (In a Good Way)
The Red Crossbill has a beak that looks broken. The tips of the upper and lower mandible cross each other — they overlap sideways. It looks wrong until you understand it's perfectly designed for prying open pine cones to reach seeds inside. Then it makes complete sense.
Males are brick red to orange-red. Females yellow-green. They travel in nomadic flocks following cone crops rather than staying in one territory. Listen for their sharp "kip kip kip" call notes overhead — often you hear them before you see them.
According to the Red Crossbill Wikipedia article, there are actually several distinct types in North America that differ in bill size and preferred tree species. Colorado hosts multiple types. It's a surprisingly deep rabbit hole once you start reading about it.
6. Broad-tailed Hummingbird — Flash of Red That Stops You
Not a "red bird" in the traditional sense, but male Broad-tailed Hummingbirds have that iridescent rose-red throat patch (gorget) that blazes in sunlight. When one hovers in front of you for a second, the color is genuinely startling.
Colorado's most common breeding hummingbird. Arrives April–May, leaves by early September. Males make a distinctive metallic trilling sound with their wings in flight — you often hear it before you see the bird. Found in mountain meadows, open forests, and gardens with flowers or feeders. Range goes from foothills up through subalpine meadows around 11,000 feet.
Put out feeders by late April — plain sugar water, 4 parts water to 1 part white sugar, no red dye needed. The red feeder alone is often enough to attract hummingbirds. Also worth reading this piece on Texas yellow birds for more feeder setup ideas that carry over.
ID note: The Rufous Hummingbird is more orange-red overall. Broad-tailed males have the red concentrated on the throat only. Both visit Colorado feeders during migration.
7. Purple Finch — The One People Forget
Purple Finch is the least common of the red finches in Colorado — mostly a migrant and winter visitor rather than a breeder. But worth knowing because it does show up and people sometimes misidentify it as a House Finch.
The name is misleading. Males are a deep raspberry-red, not purple at all. The classic description — a "sparrow dipped in raspberry juice" — is accurate. The red is more extensive than a House Finch, covering the head and breast more fully. Females have a bold white eyebrow stripe that female House Finches don't have. That stripe is your fastest field mark when sorting them out at a winter feeder.
Where Can I See Red Birds in Colorado?
Front Range: House Finches everywhere. Cherry Creek State Park in Denver, Garden of the Gods in Colorado Springs, Barr Lake State Park — solid starting points. Mountains: Rocky Mountain National Park is arguably Colorado's best all-around birding spot. Cassin's Finches, Red Crossbills, and Pine Grosbeaks in winter. Eastern Plains: For Northern Cardinals, head east. The Arkansas River corridor near Pueblo and La Junta holds decent numbers.
Colorado Parks and Wildlife maintains a good list of birding trails and wildlife areas across the state — worth bookmarking for trip planning. Most are free to access.
Year-Round or Seasonal? Quick Reference
- House Finch — year-round, everywhere
- Cassin's Finch — year-round in mountains, moves around in winter
- Northern Cardinal — year-round where established (eastern CO)
- Pine Grosbeak — winter visitor, irruptive some years
- Red Crossbill — nomadic, can appear any month
- Broad-tailed Hummingbird — April through September only
- Purple Finch — mainly migration and winter
So there's always something red around in Colorado. Winter is actually underrated — finches flock to feeders and you can see multiple species at once in the same visit. Similar seasonal patterns show up across the region; Iowa's winter birds are an interesting comparison.
How to Identify Red Birds in Colorado — Quick Cheat Sheet
House Finch: Red head + chest + rump, streaky belly, curved bill, common everywhere
Cassin's Finch: Sharp red cap, paler chest, pointed bill, mountains
Purple Finch: Deep raspberry red, white eyebrow on female, migrant/winter
Northern Cardinal: All red, crested, black mask, eastern Colorado
Pine Grosbeak: Large, rosy-red, gray wings, mountain forests in winter
Red Crossbill: Crossed bill, brick red male, nomadic flocks in conifers
Broad-tailed Hummingbird: Tiny, red throat only, hovering, spring–fall
When you're not sure, ask yourself: how big is it, what shape is the bill, and exactly where is the red? Those three questions sort out most of the confusion. The Sibley Guide to Birds covers all Colorado species well. Merlin Bird ID app (free from Cornell Lab) has photo and sound ID that's surprisingly accurate in the field.
What's That Bright Red Bird in My Colorado Backyard?
Almost certainly a House Finch. Genuinely, nine times out of ten, that's the answer. If it's much larger than a sparrow and very boldly red, you might have a Northern Cardinal (eastern Colorado) or a winter Pine Grosbeak. Tiny and hovering? Hummingbird. Strange crossed bill? Red Crossbill — and you should tell someone because that's a fun find.
Want more bird guides like this?
Visit SaveMite.com for species lists, feeder tips, and identification guides across North America. Whether you're puzzling over what's at your feeder this morning or planning a proper birdwatching trip, there's a lot there to help you out.
Good luck out there — and once you start noticing the red ones, you'll realize they were always around.