Species Comparisons • Backyard Identification
Calliope Hummingbird vs Rufous Hummingbird
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Rufous Hummingbird
Rufous Hummingbird • Wikimedia Commons
Rufous Hummingbird
Rufous Hummingbird • Wikimedia Commons
Rufous Hummingbird
Rufous Hummingbird • Wikimedia Commons
Rufous Hummingbird
Rufous Hummingbird • Wikimedia Commons
Calliope Hummingbird vs Rufous Hummingbird (Selasphorus calliope vs Selasphorus rufus): The Complete Backyard Identification Guide
Field Summary
Quick Answer: The Fastest Way to Tell Them Apart
The smallest bird in America and the feistiest. Three rules:
- Male gorget: magenta rays streaked on white = Calliope; solid orange-red shield = Rufous.
- Rufous coloring: rusty flanks, back and tail = Rufous; green and clean = Calliope.
- Size: almost impossibly tiny with a short tail = Calliope; merely small = Rufous.
At-a-Glance Comparison Table
The miniature mountain hummer and the orange bulldog of the feeder, side by side. KEY rows separate fastest.
| Feature | Calliope Hummingbird | Rufous Hummingbird |
|---|---|---|
| Scientific Name | Selasphorus calliope | Selasphorus rufus |
| Length KEY | 3.25 in (8 cm) | 3.75 in (9.5 cm) |
| Wingspan | 4.3 in (11 cm) | 4.5 in (11.5 cm) |
| Weight | 0.1 oz (2–3 g) | 0.1 oz (3–4 g) |
| Overall Shape | The smallest bird in the United States — tiny, short-tailed, short-billed | The fiery orange hummingbird — small, fierce and far-flying |
| Male Plumage KEY | Green above with a gorget of magenta streaks fanning into rays on a white throat | Blazing orange-rufous back, sides and tail with an iridescent orange-red gorget |
| Female Plumage | Green above, buffy flanks, white-tipped tail | Green above with rufous flanks and tail base; spotted throat |
| Bill Shape | Short, straight, black | Straight, black |
| Tail | Short — wingtips reach past the tail at rest | Rufous with black band and white tips (female); mostly rufous (male) |
| Core Range | Breeds in western mountains; winters in Mexico | Breeds the Pacific Northwest to Alaska; migrates through the whole West; winters in Mexico, with many wintering in the Southeast |
| Migration KEY | Long-distance migrant despite its size | One of the longest migrations relative to body size of any bird |
| Feeder Presence | Visits mountain feeders; easily bullied by larger hummingbirds | Fiercely defends sugar-water feeders against all comers |
| Favorite Foods | Nectar and tiny insects | Nectar and tiny insects |
| Song | High-pitched buzzing notes in display | No true song; wings whine in dive displays |
| Flight Call | A high, thin “chip” | A hard, chattering “tchup-tchup” |
| Population Trend | Stable in mountain meadows | Declining but still widespread; famously aggressive |
Male Field Marks, Side by Side
Calliope Hummingbird — Male
Selasphorus calliope
- Tiny — the smallest U.S. bird.
- Gorget of magenta streaks fanning like rays.
- Short tail, short bill, big attitude.
Rufous Hummingbird — Male
Selasphorus rufus
- Blazing orange-rufous overall, orange-red gorget.
- The fiercest bird at any feeder.
- Migrates up the coast in spring, down the mountains in fall.
Female & Juvenile Marks, Side by Side
Calliope Hummingbird — Female
Selasphorus calliope
- Green with buffy flanks; very small.
- Nests in mountain conifers, often on pine cones.
- Bullied at feeders by bigger hummingbirds.
Rufous Hummingbird — Female
Selasphorus rufus
- Green with rufous flanks and tail base.
- Just as aggressive as the male.
- Winters farther north than most hummingbirds.
Part-by-Part Anatomy Breakdown
Every part offers a check:
| Body Part | Calliope Hummingbird | Rufous Hummingbird |
|---|---|---|
| Male Gorget | Magenta-violet rays streaked on a white base | Solid flame-orange to red shield |
| Male Body | Green above, whitish below, green-washed sides | Rufous flanks; back partly to fully rufous |
| Size | 3.25 in, 0.1 oz — smallest bird in the US | 3.75 in — small but bigger |
| Tail | Short, extending little past the wingtips | Longer, rufous-based |
| Female | Peachy wash on flanks, green above | Green with rufous flanks and rufous tail base |
| Bill | Short and straight | Slightly longer, straight |
| Display | Male dives in a U-shape with a buzzy wing trill | Male dives steeply with a whining wing sound |
Song & Call Comparison
Calliope Hummingbird
Selasphorus calliope
Calls: a high, thin chip; buzzing notes in the dive display.
Display: U-shaped dives over mountain meadows.
Calliope Hummingbird voice • Wikimedia Commons
Rufous Hummingbird
Selasphorus rufus
Calls: hard chattering tchup-tchup notes.
Display: wings whine in steep dive displays. (no open recording available)
Range & Seasonal Presence
The Calliope Hummingbird breeds in mountain meadows of the Northwest and Rockies and migrates through the high country to Mexico.
The Rufous Hummingbird breeds from the Pacific Northwest to Alaska — the northernmost hummingbird — and makes a clockwise migration, returning north along the coast in spring and south through the Rockies in late summer.
Feeder Behavior & Favorite Foods
- Calliope Hummingbird: visits nectar feeders in mountain towns, often sharing with other hummers.
- Rufous Hummingbird: legendary feeder tyrant — one male can clear every other bird off the station.
- Recipe: 1 part white sugar to 4 parts water, no dye, changed every 2–3 days in heat.
- Timing: Rufous pass through the Rockies in July–August; Calliopes are already on their breeding meadows by May.
Temperament & Flock Behavior
Calliope Hummingbirds are comparatively mild, feeding alongside rivals and hovering low over meadow flowers.
Rufous Hummingbirds defend feeders and flower patches with relentless chases — ounce for ounce among the most aggressive birds on the continent.
6-Step Backyard ID Checklist
- Gorget. Streaked magenta rays = Calliope; solid orange = Rufous.
- Flanks. Rufous-washed = Rufous; pale with green wash = Calliope.
- Size. Smallest bird you have ever seen = Calliope.
- Tail. Short = Calliope; longer, rufous-based = Rufous.
- Behavior. Calmly sharing = Calliope; running the feeder = Rufous.
- Location. High mountain meadow = either; lowland spring migration on the coast = Rufous.
Frequently Asked Questions
How do you tell a Calliope from a Rufous Hummingbird?
Male Calliopes have magenta rays streaked on a white gorget and green-washed sides; male Rufous have a solid flame-orange gorget and rufous flanks, back and tail. Calliopes are also the smallest bird in the US.
What is the smallest bird in the United States?
The Calliope Hummingbird — about 3.25 inches long and barely a tenth of an ounce.
Which hummingbird is the aggressive one?
The Rufous — famous for driving other hummingbirds, and even larger birds, away from feeders.
Do their ranges overlap?
Yes — both breed in the Northwest and pass through the Rockies, where mountain feeders can host both in late summer.
What do the females look like?
Both are green above. Rufous females show rufous flanks and a rufous tail base; Calliope females are plainer with a light peachy wash and a shorter tail.
What is the correct nectar recipe?
One part plain white sugar to four parts water. No honey, no red dye, and clean the feeder every few days.
Key Takeaways
- Gorget: Streaked rays = Calliope; solid orange = Rufous.
- Flanks: Rufous = Rufous; green-washed = Calliope.
- Size: Tiny with short tail = Calliope.
- Attitude: Feeder tyrant = Rufous.
- Range: Both share western mountains in late summer.
- Nectar: 1:4 sugar-water, no dye, for both.