Colorado · Suet · Mountain West
When to start (and stop) suet feeding in Colorado
Start suet by September 15, retire the raw cakes late may, and let no-melt dough cover the shoulder seasons.
Start suet by
September 15
Birds need it most
first hard frosts, mid-September in the high country
Prime season
October through April
Stop raw suet after
late May — and in the foothills, bring feeders in at night from March, when bears wake
Suet season from September 15 until late may.
The Colorado suet season
Colorado's long cold season makes it prime suet country — Mountain and Black-capped Chickadees, three nuthatch species, and Hairy Woodpeckers work cakes from September to May. The foothills bear rule is non-negotiable: from spring wake-up until November denning, feeders come in every night from Boulder to Durango.
Unlike hummingbird and oriole timing, the suet calendar runs on temperature, not migration — the birds are here all year. Cold is what turns a cake from a snack into a lifeline: insects vanish under bark, days shorten, and a chickadee's daily fat budget becomes a survival problem your feeder solves.
Suet birds in Colorado
| Species | Status in Colorado |
|---|---|
| Downy Woodpecker | Year-round resident |
| Hairy Woodpecker | Year-round resident |
| Northern Flicker | Year-round resident |
| White-breasted Nuthatch | Year-round resident |
| Chickadees | Year-round resident |
Make your own cakes: one part fat, one part peanut butter, three parts dry — scaled to your mold count.
Suet cake recipe calculatorFrequently asked questions
When should I start feeding suet in Colorado?
By September 15 — suet earns its keep once cold weather locks insects away under bark, and in Colorado demand ramps up first hard frosts, mid-September in the high country. Starting a couple of weeks early lets the local woodpeckers and chickadees add your feeder to their winter circuit before they need it.
When should I stop feeding suet in Colorado?
late May — and in the foothills, bring feeders in at night from March, when bears wake. Raw suet turns rancid quickly once daily highs pass about 70°F — soft, dripping, or sour-smelling suet can foul feathers and sicken birds. Commercial no-melt suet dough is heat-stable and extends the season safely.
Does suet really go bad in warm weather?
Yes, and faster than most people think. Above roughly 70°F raw suet softens and oxidizes within days; above 80°F it can spoil in one. Spoiled fat smells sour, looks darkened or greasy, and should be discarded, not topped up. Warm-weather feeding is what no-melt dough (rendered fat blended with corn products) is made for.
What birds will suet attract in Colorado?
Downy Woodpecker, Hairy Woodpecker, Northern Flicker, White-breasted Nuthatch, Chickadees are the regulars — plus winter bonuses like kinglets, wrens, and Yellow-bellied Sapsuckers during cold snaps. Suet is the single best way to bring woodpeckers to a yard.
Nearby states
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