Curve-billed Thrashers in Colorado
When curve-billed thrashers are present in Colorado, when they nest, which native Colorado plants feed them, and how to host them in a USDA 3a–7b yard.
- Status in Colorado
- Year-round resident
- Nesting window
- March–July
- Broods
- 1–2 per season
- Hardiness zones
- USDA 3a–7b
When to expect curve-billed thrashers in Colorado
Curve-billed Thrashers 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: their winter diet shifts toward cactus fruit and seeds.
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, curve-billed thrashers typically nest from March–July. Nest site: twig cup in cholla or thorny shrubs. Females lay 2–4 eggs, incubate for 12–15 days, and young leave the nest after 14–18 days.
Warm, dry days and cool nights; afternoon storms are common in July and August.
- Curve-billed Thrashers don't use nest boxes. Keep dense native shrubs and trees such as smooth sumac, virginia creeper, pin cherry for nest sites.
- Delay heavy pruning of shrubs until after July.
Native Colorado plants that attract curve-billed thrashers
Of the regional native plants we track for Colorado, these 8 provide food or cover curve-billed thrashers use:
Red fruit heads hang on through winter.
Blue fruit on red stems in early fall.
Late nectar for insects and fall seed for sparrows.
Insect-rich in fall and seed in winter.
Fast-growing northern cherry with midsummer fruit.
Dark summer fruit and heavy caterpillar load.
White fruit and red winter stems; good thicket cover.
Berry-like cones feed bluebirds, solitaires and waxwings in winter.
Feeding curve-billed thrashers through the Colorado year
Digs with its bill under desert shrubs; nests in cholla.
- Best foods: Mealworms, Sunflower chips.
- In Colorado's winter: Cold snaps alternate with sunny, dry thaws; heated baths are valuable because natural water freezes nightly.
Full diet breakdown for curve-billed thrashers · Best feeder for curve-billed thrashers
Frequently asked
Are curve-billed thrashers in Colorado year-round?
Yes. Curve-billed Thrashers are year-round residents in Colorado.
When do curve-billed thrashers nest in Colorado?
Nesting in Colorado typically runs March–July, with 1–2 per season. Clutches are 2–4 eggs, incubated for 12–15 days.
What native plants attract curve-billed thrashers in Colorado?
Smooth sumac, Virginia creeper, New England aster, Tall goldenrod, Pin cherry, Chokecherry, Red-osier dogwood, Rocky Mountain juniper are native plants in Colorado that provide food or cover for curve-billed thrashers.
Curve-billed Thrashers in other regions
Other backyard birds in Colorado
Sources
- Curve-billed Thrasher — All About Birds, Cornell Lab of Ornithology
- Curve-billed Thrasher life history — Cornell Lab of Ornithology
- Curve-billed Thrasher — Audubon Guide to North American Birds
- eBird region overview and bar charts — Colorado
- USDA Plant Hardiness Zone Map (2023)
- Audubon Native Plants Database
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.