Cardinals in Colorado: How Rare They Are and Where Birders Spot Them

Colorado’s official state bird is the lark bunting, not the fire-red songbird many transplants from the Midwest or South expect to see on a snowy fence post. Cardinals in Colorado are real, but they show up as scattered surprises rather than yard regulars the way they do in Ohio or Georgia.

This piece breaks down why the Northern Cardinal barely reaches the state, where the rare sightings have clustered, and what birders along the Front Range and eastern plains can realistically expect if they hope to spot or attract one.

Understanding Cardinals in Colorado

The Northern Cardinal (Cardinalis cardinalis) is one of the most recognized birds in North America, and for good reason. According to the National Audubon Society, the Northern Cardinal is the official state bird of no fewer than seven eastern states. Males are the brilliant red birds most people picture, while females wear a warmer, streaked brown with reddish highlights on the wings and crest.

What Makes a Northern Cardinal

A Northern Cardinal measures roughly the size of a robin, with a length of 8-9 inches, a wingspan of 9-12 inches, and a weight between 1.5 and 1.7 ounces, according to Audubon’s field guide. The crest, thick orange-red bill, and long tail make it distinctive even at a glance, which helps considering how few Coloradans ever get more than a quick look.

One quirk that surprises new birdwatchers: cardinals do not molt into a dull version of their bright red plumage during winter, according to reporting in the Estes Valley Spotlight. That means a male cardinal spotted against Colorado snow looks just as vivid in January as it does in June.

Why Cardinals Rarely Reach Colorado

West of the Great Plains, the Northern Cardinal is mostly absent, though it is locally common in the desert Southwest, Audubon notes. Colorado sits right at that western edge, and the habitat is part of the problem. Cardinals favor brushy, shrub-and-sapling habitat, and the Colorado Virtual Library notes that “Cardinals are birds of early successional forests” — a habitat type the state has relatively little of.

This isn’t a new pattern. The Birds of Colorado, an 1897 publication from the Colorado Agricultural Experiment Station, notes that the first recorded sighting of the species in Colorado dates to a scientific publication in 1885. That same 1897 publication described the bird as “rare, if not accidental” in the state, a characterization that has held up remarkably well for more than a century.

You might wonder whether cardinals have quietly become more common in recent decades. There is some speculation about whether the birds have been expanding their range in Colorado in recent years, though observations have technically been recorded in the state for more than a century. A separate analysis on Nature’s Blog found that as of 2013, cardinals had begun turning up along the South Platte, Republican, and Arkansas Rivers over roughly the prior fifteen years, moving up those riparian corridors from the Great Plains.

Where and When Colorado Sightings Happen

As of August 2025, eBird listed 1,637 Northern Cardinal sightings in Colorado — a number that sounds substantial until you consider that some of the state’s more common birds have recorded more than a quarter million official sightings. Observations have mostly occurred on the eastern plains, especially near the Kansas border, with additional sightings in Boulder and along the I-25 corridor.

Timing matters too. According to eBird, most Colorado sightings have occurred between April and June. That spring window lines up with when many birds wander outside their normal range while establishing territory, so it’s the best time to keep an eye on feeders in the eastern half of the state.

Colorado has plenty of other colorful birds that draw far more reliable sightings than the cardinal does. If red plumage is what caught your attention, it’s worth browsing birds with red heads in Colorado for species you’re much more likely to actually find. Fans of color diversity might also enjoy learning about yellow birds in Colorado or the state’s various blue-plumaged birds, both far more dependable backyard visitors than a wandering cardinal.

Key Insight: Cardinal sightings in Colorado cluster almost entirely along river corridors and the eastern plains near Kansas. If you live in the mountains or western Colorado, the odds of a visit drop to nearly zero regardless of habitat or feeder setup.

Practical Guidance on Cardinals in Colorado

Whether the goal is identifying a possible cardinal sighting or trying to draw one to a backyard feeder, a few practical details make the difference between a confirmed sighting and a case of mistaken identity.

How to Tell a True Cardinal From Look-Alikes

A common question among Colorado birders is whether the red or reddish bird at the feeder is actually a cardinal or something more common. The House Finch is the usual culprit. Birdfy’s guide to cardinal look-alikes notes that House Finches are among the most common backyard birds in North America, and the males’ red face and breast markings are a frequent source of cardinal confusion. Female cardinals cause their own mix-ups, since their warm brown bodies with reddish tones on the wings, tail, and crest are often mistaken for a separate “brown cardinal” species.

The Pyrrhuloxia, sometimes called the desert cardinal, does not occur in Colorado but appears often enough in identification guides that it’s worth knowing the difference. The Pyrrhuloxia is the closest match to a true cardinal, sharing a crest, stocky build, and heavy bill, though its coloring runs gray with pink rather than solid scarlet. The easiest tell, per Harvest Seed & Supply’s identification guide, is the bill: a Pyrrhuloxia’s beak is yellow where a cardinal’s is orange.

Feature	Northern Cardinal	House Finch	Pyrrhuloxia
Color	Solid scarlet red (male)	Red face and breast, brown back	Gray with pink highlights
Bill	Thick, orange-red	Small, conical, gray	Thick, yellow
Crest	Prominent pointed crest	No crest	Prominent pointed crest
Found in Colorado	Rare, mostly eastern plains	Common statewide	Not found in Colorado

For anyone chasing other color-coded identification puzzles around the state, the same logic applies to purple-toned birds, which are frequently confused with darker finches and grackles at a glance.

Tips for Spotting Cardinals in the Wild

Because sightings are so concentrated, strategy matters more than luck. The following approaches give birders the best odds:

• Check eBird’s Colorado hotspot maps before heading out, focusing on the eastern plains near the Kansas border and the I-25 corridor around Boulder.
• Bird during the April-through-June window, when most confirmed Colorado sightings have occurred.
• Walk river corridors such as the South Platte, Arkansas, and Republican, where cardinals have historically moved into the state.
• Use a bird identification app like Merlin alongside binoculars to confirm a sighting rather than relying on a quick glimpse of red.
• Report confirmed sightings to eBird’s Northern Cardinal page for Colorado so other birders and researchers can track range shifts over time.

Attracting Cardinals to a Colorado Backyard

Anyone within the eastern plains or Front Range river corridors can try to draw a cardinal in with the right setup, but expectations need to be realistic outside those zones. One feeder guide is blunt about this: if cardinals aren’t native to your particular area, there’s nothing a backyard can do to attract them. That caveat matters a great deal in a state where the species is a genuine rarity rather than a common resident.

Important Note: Cardinals are non-migratory and stay within established territory year-round once they settle. This is good news if one does take up residence near you, but it also means birders outside the eastern plains and river corridors are unlikely to ever see one regardless of feeder setup.

For those in a plausible cardinal zone, feeder choice matters. Kingsyard’s guide to attracting cardinals points out that cardinals prefer feeders that don’t sway or tip, since their weight of 1.5 to 2 ounces makes hanging feeders challenging unless they’re well stabilized. Platform and hopper feeders with a wide, sturdy tray work better than tube feeders built for lighter finches.

Food choice follows a similar logic. Recommended seed includes black oil sunflower, cracked corn, suet, Nyjer seed, mealworms, peanuts, safflower, striped sunflower, and sunflower hearts and chips, according to Kaytee’s wild bird feeding guide. Cardinals also round out their diet with insects and berries in the wild, which ties into the broader question of what birds eat to survive across changing seasons.

Water and shelter round out the setup. Water attracts more cardinals than food alone, and placing feeders five to ten feet from shrubs gives birds quick escape cover from hawks and other predators, per Kingsyard’s guidance. Dense native shrubs also double as nesting habitat, since cardinals build open cup nests in shrubs and small trees rather than using birdhouses.

Pro Tip: Before planting shrubs for shelter, check which species are safe. Some ornamental landscaping plants are toxic to backyard birds, so it’s worth reviewing a list of plants that are poisonous to birds before adding new cover near feeders.

Cardinals aren’t the only rare or unexpected color in Colorado’s bird life worth watching for. Anyone drawn to unusual sightings might also enjoy tracking the state’s hummingbirds in Colorado, which migrate through in far greater and more predictable numbers each summer. None of Colorado’s cardinal-adjacent species carry any conservation concern, either; for context on which Colorado species actually do, see this overview of endangered animals in Colorado.

Conclusion

Cardinals in Colorado remain a genuine rarity rather than a backyard guarantee, with sightings clustered on the eastern plains, along the Kansas border, and near river corridors like the South Platte and Arkansas. Nationally, the species is doing fine — the North American population approximates 110 million breeding adults, and Partners in Flight has assigned it a low Continental Concern Score of 5 out of 20. Colorado simply sits at the western edge of where that population reaches.

For birders in the right pocket of the state, patience during the April-to-June window, a sturdy platform feeder stocked with sunflower seed, and a water source give the best realistic shot at a sighting. For everyone else, the search itself is part of the appeal — and Colorado has no shortage of other striking, far more reliable birds to enjoy while watching for that one flash of red that might, just might, turn out to be the real thing.