Colorado · Year-round resident

Northern Saw-whet Owls in Colorado

When saw-whet owls are present in Colorado, when they nest, which native Colorado plants feed them, and how to host them in a USDA 3a–7b yard.

Owls (Strigidae)Northern Saw-whet OwlAegolius acadicus

Status in Colorado: Year-round resident
Nesting window: March–June
Broods: 1–2 per season
Hardiness zones: USDA 3a–7b
Nest box: 2 1/2 in hole, 6 × 6 in floor, 10–20 ft

When to expect saw-whet owls in Colorado

Northern Saw-whet Owls live in Colorado all year. Cold snaps alternate with sunny, dry thaws; heated baths are valuable because natural water freezes nightly. That makes the cold months the time your yard matters most to them.

Semi-arid high plains in the east and the Rocky Mountains through the center, with most backyards between 5,000 and 7,000 ft.

Nesting in Colorado

Across Colorado, saw-whet owls typically nest from March–June. Plan around that window: February for setup, June for clean-out.

Warm, dry days and cool nights; afternoon storms are common in July and August.

Have boxes cleaned and mounted before February — saw-whet owls begin prospecting ahead of egg-laying.
Use a 2 1/2 in entrance on a 6 × 6 in floor, mounted 10–20 ft.
Fit a pole baffle or hole guard; ventilation gaps and drainage holes are essential.
Clean out old nests after each brood and again after June.

Native Colorado plants that attract saw-whet owls

Of the regional native plants we track for Colorado, these 8 provide food or cover saw-whet owls use:

New England aster

Symphyotrichum novae-angliae · Perennial

Late nectar for insects and fall seed for sparrows.

Tall goldenrod

Solidago altissima · Perennial

Insect-rich in fall and seed in winter.

Chokecherry

Prunus virginiana · Shrub

Dark summer fruit and heavy caterpillar load.

Rocky Mountain juniper

Juniperus scopulorum · Tree

Berry-like cones feed bluebirds, solitaires and waxwings in winter.

Ponderosa pine

Pinus ponderosa · Tree

Seeds and bark insects; pygmy nuthatch and woodpecker habitat.

Gambel oak

Quercus gambelii · Tree

Acorns for jays and woodpeckers across the southern Rockies.

Rabbitbrush

Ericameria nauseosa · Shrub

Late-season bloom supports insects; seed for sparrows.

Douglas fir

Pseudotsuga menziesii · Tree

Seed for crossbills, siskins and chickadees.

Feeding saw-whet owls through the Colorado year

Top foods: None — a saw-whet box in dense conifers is the draw.
In Colorado's winter: Cold snaps alternate with sunny, dry thaws; heated baths are valuable because natural water freezes nightly.

Full diet breakdown for saw-whet owls · Best feeder for saw-whet owls

Frequently asked

Are saw-whet owls in Colorado year-round?

Yes. Northern Saw-whet Owls are year-round residents in Colorado.

When do saw-whet owls nest in Colorado?

Nesting in Colorado typically runs March–June, with 1–2 per season. Clutches are 4–7 eggs, incubated for 27–29 days.

What native plants attract saw-whet owls in Colorado?

New England aster, Tall goldenrod, Chokecherry, Rocky Mountain juniper, Ponderosa pine, Gambel oak, Rabbitbrush, Douglas fir are native plants in Colorado that provide food or cover for saw-whet owls.

What size birdhouse hole do saw-whet owls need?

2 1/2 in, with a floor of 6 × 6 in mounted 10–20 ft.

Other backyard birds in Colorado

Black-capped Chickadee Downy Woodpecker Hairy Woodpecker American Goldfinch White-breasted Nuthatch House Wren House Finch Mourning Dove American Robin Dark-eyed Junco Song Sparrow Chipping Sparrow Northern Flicker Red-breasted Nuthatch Brown Creeper Common Grackle Red-winged Blackbird Evening Grosbeak Pine Siskin Indigo Bunting Gray Catbird Northern Mockingbird Brown Thrasher Cedar Waxwing Tree Swallow Barn Swallow Yellow-rumped Warbler Eastern Screech-Owl Eastern Kingbird American Tree Sparrow House Sparrow European Starling Steller's Jay Woodhouse's Scrub-Jay Black-billed Magpie Canada Jay Mountain Chickadee Bushtit Juniper Titmouse Pygmy Nuthatch Black-chinned Hummingbird Broad-tailed Hummingbird Lesser Goldfinch Cassin's Finch Spotted Towhee Canyon Towhee Gambel's Quail Western Bluebird Mountain Bluebird Say's Phoebe Ladder-backed Woodpecker Curve-billed Thrasher Bewick's Wren White-crowned Sparrow Fox Sparrow Violet-green Swallow Black-headed Grosbeak Lazuli Bunting Bullock's Oriole Eurasian Collared-Dove American Crow Common Raven Cooper's Hawk Sharp-shinned Hawk Red-tailed Hawk Great Horned Owl American Kestrel Wild Turkey Mallard Great Blue Heron Belted Kingfisher Brown-headed Cowbird Ruby-crowned Kinglet Golden-crowned Kinglet Hermit Thrush Pine Grosbeak Red Crossbill Gray Catbird Western Tanager Black-throated Sparrow Lark Sparrow Green-tailed Towhee Pinyon Jay Clark's Nutcracker Western Screech-Owl Hooded Merganser Band-tailed Pigeon Yellow Warbler Common Yellowthroat American Redstart Yellow-breasted Chat Orange-crowned Warbler Red-eyed Vireo Warbling Vireo Least Flycatcher Western Kingbird Scissor-tailed Flycatcher Ash-throated Flycatcher Cliff Swallow Northern Rough-winged Swallow Bank Swallow Common Nighthawk Canada Goose American Coot Killdeer Spotted Sandpiper Black-crowned Night Heron Turkey Vulture Osprey Bald Eagle Merlin Peregrine Falcon Burrowing Owl Lewis's Woodpecker Black-backed Woodpecker American Three-toed Woodpecker Savannah Sparrow Vesper Sparrow Snow Bunting Lapland Longspur Horned Lark White-winged Crossbill Gray-crowned Rosy-Finch Bohemian Waxwing Greater Roadrunner Bobolink Yellow-headed Blackbird Brewer's Blackbird Great-tailed Grackle Rock Pigeon

Sources

Timing reflects typical patterns for the region as a whole; local dates vary with elevation and year. Check the linked eBird bar charts for your county.