Species Comparisons • Backyard Identification
Anna’s Hummingbird vs Calliope Hummingbird
Anna’s Hummingbird
Anna’s Hummingbird • Wikimedia Commons
Anna’s Hummingbird
Anna’s Hummingbird • Wikimedia Commons
Anna’s Hummingbird
Anna’s Hummingbird • Wikimedia Commons
Anna’s Hummingbird
Anna’s Hummingbird • Wikimedia Commons
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Calliope Hummingbird
Calliope Hummingbird • Wikimedia Commons
Anna’s Hummingbird vs Calliope Hummingbird (Calypte anna vs Selasphorus calliope): The Complete Backyard Identification Guide
Field Summary
Quick Answer: The Fastest Way to Tell Them Apart
The West Coast’s year-round bird and the tiny mountain jewel. Three rules:
- Male gorget: a solid rose-pink helmet covering crown and throat = Anna’s; magenta-pink streaks radiating like whiskers over a white throat = Calliope.
- Size: the Calliope at 3.3 inches is the smallest bird in the United States — visibly tiny, short-tailed and short-billed next to the stockier Anna’s.
- Place and season: coastal lowlands year-round = Anna’s; mountain meadows of the Northwest and Rockies in summer = Calliope.
At-a-Glance Comparison Table
Pink helmet vs whiskers, side by side. KEY rows separate fastest.
| Feature | Anna’s Hummingbird | Calliope Hummingbird |
|---|---|---|
| Scientific Name | Calypte anna | Selasphorus calliope |
| Length KEY | 3.9–4.3 in (10–11 cm) | 3.3 in (8 cm) |
| Wingspan | 4.7 in (12 cm) | 4.1 in (10.5 cm) |
| Weight | 0.1–0.2 oz (3–6 g) | 0.1 oz (2.5–3 g) |
| Overall Shape | Mid-sized hummingbird, stocky for its family | The smallest bird in the United States — tiny, short-tailed |
| Male Plumage KEY | Entire head and throat covered in iridescent rose-pink (the “helmet”), flashing in sun | Green back, white breast, and a gorget of magenta-pink streaks radiating over a white throat like whiskers |
| Female Plumage | Green above, gray below, with a small patch of rose spots on the throat | Green above, peachy-buff flanks below, whitish throat with fine dark streaks |
| Bill Shape | Straight, slender black bill | Short, straight, black |
| Tail | Short gray-green tail | Short, dark, square |
| Core Range KEY | Pacific coast year-round from British Columbia to Baja; expanding inland | Breeds in mountain meadows of the Northwest and Rockies; winters in Mexico |
| Migration KEY | Non-migratory — the West Coast’s winter hummingbird | Long-distance migrant despite its size — mountains of the West to Mexico |
| Feeder Presence | The default sugar-water feeder hummingbird on the Pacific coast | Visits sugar-water feeders in mountain and foothill yards during breeding and migration |
| Favorite Foods | Nectar, sugar water (4:1), tiny insects | Nectar from mountain wildflowers; tiny insects |
| Song | A buzzy, squeaky warbled series — one of the few singing hummingbirds | No true song — high thin chips |
| Flight Call | Hard “chick” notes; males dive with a loud tail chirp | A very high, thin “tsip” |
| Population Trend | Expanding north and inland with feeders and gardens | Stable; watches for habitat loss on Mexican wintering grounds |
Male Field Marks, Side by Side
Anna’s Hummingbird — Male
Calypte anna
- Rose-pink helmet covering the whole head and throat.
- Gorger flashes magenta in sun, looks dark in shade.
- Perches prominently, singing buzzy songs even in winter.
Calliope Hummingbird — Male
Selasphorus calliope
- Magenta gorget streaks radiating like whiskers over a white throat.
- The smallest bird in the US — 3.3 inches.
- Green back; white breast with buff flanks.
Female & Juvenile Marks, Side by Side
Anna’s Hummingbird — Female
Calypte anna
- Green and gray with a spotted rose throat patch.
- Stockier than migrant hummingbirds.
- Visits feeders through West Coast winters.
Calliope Hummingbird — Female
Selasphorus calliope
- Green above with peachy-buff flanks.
- Tiny, short-tailed, short-billed — smaller than any other US hummingbird.
- Throat whitish with fine streaks, no central patch.
Part-by-Part Anatomy Breakdown
The gorget pattern settles males; size and flank color guide the rest:
| Body Part | Anna’s Hummingbird | Calliope Hummingbird |
|---|---|---|
| Gorget (M) | Solid rose-pink over crown and throat | Magenta streaks radiating over a white throat |
| Crown (M) | Rose-pink like the gorget | Green |
| Breast (M) | Gray-green, dingy | White with buff flanks |
| Size | 3.9–4.1 in, stocky | 3.3 in — the smallest bird in the US |
| Female Flanks | Gray-green | Peachy-buff |
| Female Throat | White with rose spotting in the center | Whitish with fine dark streaks |
| Bill & Tail | Average proportions | Noticeably short bill and tail |
Song & Call Comparison
Anna’s Hummingbird
Calypte anna
Song: a buzzy, squeaky warbled series delivered from an exposed perch — unusual among hummingbirds.
Display: a sky-dive ending in a loud tail-generated chirp.
Anna’s Hummingbird voice • Wikimedia Commons
Calliope Hummingbird
Selasphorus calliope
Voice: a very high, thin tsip.
Display: males dive with a buzzy trill from wings and tail.
Calliope Hummingbird voice • Wikimedia Commons
Range & Seasonal Presence
Anna’s Hummingbird is a year-round resident of the Pacific coast and urban Southwest, from British Columbia to Arizona.
The Calliope Hummingbird breeds in mountain meadows of the interior Northwest and Rockies and migrates to Mexico — despite weighing less than a penny. It passes through western foothill yards in spring and late summer; coastal lowlands belong to Anna’s.
Feeder Behavior & Favorite Foods
- Anna’s Hummingbird: defends coastal feeders all year; winter feeders are survival gear on the West Coast.
- Calliope Hummingbird: visits mountain and foothill feeders during breeding and migration; its tiny size lets bigger hummingbirds bully it off exposed feeders — a feeder near flowers and cover helps.
- Feeder setup: the same 4:1 sugar water for both; in mountains, bring feeders in on freezing nights in spring.
- Plants: Anna’s runs on salvias and ornamentals; Calliope favors mountain wildflowers — paintbrush, penstemon, lupine.
Temperament & Flock Behavior
Anna’s Hummingbirds are bold and vocal — scratchy songs from exposed perches year-round.
Calliope Hummingbirds are fierce for their size — males defend mountain meadows with steep buzzing dives — but at lowland feeders they give way to the bigger Anna’s.
6-Step Backyard ID Checklist
- Male gorget. Solid pink helmet = Anna’s; magenta whisker-streaks = Calliope.
- Size. Tiny (3.3 in) with short bill and tail = Calliope; stockier = Anna’s.
- Place. Coast = Anna’s; mountain meadows = Calliope.
- Season. Winter = Anna’s; Calliope winters in Mexico.
- Female flanks. Peachy-buff = Calliope; gray-green = Anna’s.
- Voice. Scratchy perched song = Anna’s; thin high “tsip” = Calliope.
Frequently Asked Questions
How do you tell a Calliope from an Anna’s Hummingbird?
Males: the Calliope’s magenta gorget breaks into streaks radiating like whiskers over a white throat, with a green crown; the Anna’s wears a solid rose-pink helmet over crown and throat. Calliopes are also visibly tinier — the smallest birds in the US.
What is the smallest bird in the United States?
The Calliope Hummingbird — about 3.3 inches long and lighter than a penny. Anna’s Hummingbirds run noticeably bigger and stockier at around 4 inches.
Where do Calliope Hummingbirds live?
They breed in mountain meadows of the interior Northwest and Rockies and winter in Mexico. Anna’s Hummingbirds live year-round along the Pacific coast.
Do Calliope Hummingbirds come to feeders?
Yes, in mountain and foothill yards during breeding and migration — but their tiny size lets larger hummingbirds bully them, so a feeder near flowers and cover works best.
Can female Calliope and Anna’s be separated?
Carefully: Calliope females show peachy-buff flanks and a whitish, finely streaked throat; Anna’s females are gray-green with rose spotting in the center of the throat. Range and season usually decide it.
Does the Calliope migrate despite its size?
Yes — it makes a full long-distance migration between northwestern mountains and Mexico every year, one of the smallest long-distance migrants on Earth.
Key Takeaways
- Gorget: Pink helmet = Anna’s; magenta whiskers = Calliope.
- Size: Smallest bird in the US = Calliope; stockier = Anna’s.
- Range: Coast = Anna’s; NW mountains = Calliope.
- Season: Year-round = Anna’s; summer migrant = Calliope.
- Female Flanks: Peachy = Calliope; gray-green = Anna’s.
- Voice: Scratchy song = Anna’s; thin “tsip” = Calliope.