When do black-crowned night herons arrive in Colorado?
The Black-crowned Night Heron is a summer breeder in Colorado — here is when to expect it, when it leaves, and how to be ready.
Black-crowned Night Heron timing in Colorado
- Arrives
- Around February
- Leaves
- By August
- Status here
- Summer breeder
- Nesting season
- March–July
- Present roughly
- February–August
In Colorado, black-crowned night herons are present through the warm months, arriving around February and heading south again by August.
These windows are set by latitude: Colorado sits in the middle part of this species' range, so timing here tracks the continental average closely. In any given year, weather can move the first arrivals by a week or two either way.
Month by month in this state
Highlighted months are when black-crowned night herons are expected in Colorado. The edges of the window are the interesting weeks — first arrivals and last departures vary most from year to year.
Getting ready before they arrive
The week before February is the time to act. Have feeders cleaned, filled and out by early February — the first black-crowned night herons into Colorado are scouting for reliable food, and a station that's ready early gets added to their route.
Once nesting begins around March, adults switch to protein-rich food for their young and visits to feeders become quick and purposeful. Expect the busiest activity at dawn.
What black-crowned night herons eat while they're here
- Fish, frogs, crayfish and insects
Roosts in dense trees by day and raids ponds at night; often overlooked in city parks.
Full Black-crowned Night Heron diet guide → · Best feeder for black-crowned night herons →
Native plants that hold black-crowned night herons in Colorado
Food keeps a migrant for a day; habitat keeps it for the season. These Colorado-native plants are known to attract black-crowned night herons:
Late nectar for insects and fall seed for sparrows.
Insect-rich in fall and seed in winter.
Dark summer fruit and heavy caterpillar load.
Seeds and bark insects; pygmy nuthatch and woodpecker habitat.
Acorns for jays and woodpeckers across the southern Rockies.
Late-season bloom supports insects; seed for sparrows.
Seed for crossbills, siskins and chickadees.
Early catkins draw insects for arriving warblers and hummingbirds.
Keep exploring
Frequently asked
When do black-crowned night herons arrive in Colorado?
black-crowned night herons typically arrive in Colorado around February, with nesting underway by March. Timing can shift a week or two with the weather in any given year.
When do black-crowned night herons leave Colorado?
Most black-crowned night herons have left Colorado by August. They spend the winter farther south and return the following spring.
Do black-crowned night herons stay in Colorado all year?
No — in Colorado the Black-crowned Night Heron is a summer breeder, present roughly February–August. Outside that window it is rarely seen in the state.
What should I put out before black-crowned night herons arrive in Colorado?
Have feeders up and clean by early February — first arrivals scout reliable food sources. Good offerings for this species: fish, frogs, crayfish and insects.
Sources
- Black-crowned Night Heron — All About Birds, Cornell Lab of Ornithology
- Black-crowned Night Heron life history — Cornell Lab of Ornithology
- Black-crowned Night Heron — 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.