Small Owls |
Northern Pygmy Owl
| Length: 5.9–6.7 inches Wingspan: 12 inches | Native | Northern Colorado, around Boulder County | Spring to early summer (Late April to June) |
Burrowing Owl
| Length: 9-11 inches Wingspan: 21-24 inches | Native | Prairie dog “towns” in northern Colorado, around the Fort Collins area | Late winter to early spring (February to August) |
Flammulated Owl
| Length: 6.5-7.5 inches Wingspan: 12-15 inches | Native | Common where ponderosa pine and Douglas firs grow, with sightings in Rocky Mountain National Park, San Juan National Forest, and Pike National Forest | Late spring to early summer (mid-April to July) |
Western Screech Owl
| Length: 8.7 inches Wingspan: 22 inches | Native | Southwestern Colorado, near the Arkansas River as well as in places like Barr Lake State Park | Late winter to early summer (February to May) |
Eastern Screech Owl
| Length: 6-10 inches Wingspan: 18-24 inches | Native | Southwestern Colorado, near the Arkansas River, as well as in places like Barr Lake State Park | Late winter to spring (February to April) |
Northern Saw-whet Owl
| Length: 7 – 8 inches Wingspan: 17-22 inches | Native | Difficult to track, but repeated sightings have taken place in Pinewood Springs and Estes Park | Spring (March to April) |
Boreal Owl
| Length: 8.7–10.6 inches Wingspan: 20–24 inches | Native | Seen in the northern part of the state, mostly in thesubalpine forests of the Rocky Mountains, as well as White River National Forest and Medicine Bow–Routt National Forest | Spring to summer (March to July) |
Large Owls |
Barn Owl
| Length: 12-16 inches Wingspan: 42-43 inches | Native | Common throughout the state, spreading across multiple counties like Adams, Boulder, Fremont, Larimer, Mesa, Montrose, Morgan, Pueblo, and more | Year-round, with peaks in late winter and spring (March to June) |
Great Horned Owl
| Length: 18-25 inches Wingspan: 40-60 inches | Native | Common and seen in both urban and forested areas, including Rocky Mountain National Park, Great Sand Dunes National Park, Pikes Peak, and more | Late fall to early winter (November to January) |
Barred Owl
| Length: 16-24 inches Wingspan: 16-24 inches | Native | Extremely rare, only a few sightings near the Oklahoma panhandle and around South Platte River | Late winter to spring (February to April) |
Snowy Owl
| Length: 20-27 inches Wingspan: 49-58 inches | Native | These owls are seen throughout the year on the Western Slope, but during winter, they are also seen in other parts of the state | Varies by region and based on prey availability (any time between May and September) |
Long-eared Owl | Length: 13-16 inches Wingspan: 24-40 inches | Native | These owls are seen throughout the year on the Western Slope, but during winter, they are also seen other parts of the state | Late winter to Spring (February to April) |
Short-eared Owl | Length: 13-17 inches Wingspan: 33-43 inches | Native | Very common in the grasslands of eastern Colorado in places like Chatfield State Park | Varies, often in early spring (March to September) |
Spotted Owl | Length: 17 inches Wingspan: 45 inches | Native | Seen in the southern Rocky Mountains as well as National Forests like Rio Grande and Gunnison | Early spring to late summer (February to August) |