Broad-tailed Hummingbird: How to Identify One by Sound Before You See It
A male Broad-tailed Hummingbird often gives himself away before he is even visible. In ordinary flight, not just during a courtship dive, his wings produce a loud, insectlike, metallic trill that Cornell Lab's All About Birds describes as sounding "like a cricket might sound if it were zooming around in flight." That single detail solves most of the identification problem before binoculars ever come up: in the Rocky Mountain West, a loud metallic buzz on a flyby is close to a confirmed broad-tailed hummingbird identification, since this species produces the sound constantly in normal flight rather than saving it for a display.
The Wing Trill That Works Like a Fingerprint
The sound comes from specially shaped feathers in the male's wings, not his throat or tail. Per All About Birds, those wing feathers wear down by midwinter and regrow before the next breeding season, which is part of why the trill tends to sound loudest and clearest on a freshly arrived spring male and can grow fainter as the season wears on. It is worth separating this sound from the general hum every hovering hummingbird makes with its wingbeats, covered in more detail in our hummingbird wing speed guide: that low hum is a simple acoustic byproduct of wingbeat frequency, present in every species, while the Broad-tailed's trill is a separate, louder, more metallic note layered on top of it. All About Birds attributes the trill specifically to males, so a hummingbird flying past in complete silence is more likely a female, an immature bird, or a different species entirely, not a quiet Broad-tailed.
Plumage Field Marks: Males and Females
Once the bird is in view, plumage confirms the call. Adult males show a rose-magenta throat patch, iridescent green upperparts, and a white chest with greenish or buffy flanks, per Cornell's identification guide. The single most useful shape clue, on either sex, is the tail. It is relatively long and extends beyond the wingtips when the bird is perched, broad and rounded in flight, with rusty coloring at the base and white tips on the outer feathers. Most North American hummingbirds fold their tails up under or level with their wingtips at rest, so a tail that visibly clears the wings is worth a second look on its own, before checking color at all.
Size narrows things further. Adult Broad-tailed Hummingbirds run 3.1 to 3.9 inches long with a wingspan of roughly 4.7 to 5.5 inches and a weight of just 3 to 5 grams, per the Audubon Field Guide, which places them larger than a Calliope Hummingbird and slightly smaller than a Rufous Hummingbird. Females lack the throat patch and are harder to place on color alone: they show spotted cheeks and a spotted throat rather than the male's solid gorget, but they share his long, wingtip-clearing tail, which stays useful even when the more obvious male markings are not there to check.
Broad-tailed vs. Ruby-throated Hummingbird
East of the Great Plains, this comparison rarely comes up. Cornell's side-by-side species guide notes that Broad-tailed and Ruby-throated Hummingbirds do not overlap geographically during the breeding season. Where a mix-up is genuinely possible, the fastest check is the face rather than the throat. Male Broad-tailed Hummingbirds show a thin white line separating the eye from the throat, where a male Ruby-throated shows a dark patch in the same spot. Females split along a similar line: female Broad-taileds have spotted cheeks and a spotted throat, while female Ruby-throateds show duller, less distinctly spotted cheek patches. Neither mark requires more than a clear look at the face, which makes this one of the more forgiving comparisons in the genus once you know where these two similar-looking hummingbirds actually part ways.
Broad-tailed vs. Rufous Hummingbird: The Harder Call
The tougher mix-up is with the Rufous Hummingbird, a close relative that shares much of the Broad-tailed's western range and migration timing. Plumage alone gets unreliable fast within this genus, and the same caution applies here. Size is the first, coarse filter: Broad-tailed is slightly smaller than a Rufous Hummingbird. Tail length does more of the real work. Per Cornell's direct comparison, female Rufous Hummingbirds are slightly smaller with a shorter tail that barely extends beyond the wings, while female Broad-taileds have a tail that extends well beyond them, and female Broad-taileds also show grayer cheeks and a white eyering that female Rufous Hummingbirds lack. None of these marks are visible at a glance from across a yard, which is exactly why checking range and season first, covered below, does real work before plumage even enters the picture.
Where and When to Find One: A High-Elevation Specialist
Broad-tailed Hummingbirds breed almost entirely at elevation, in mountain meadows and open pine-oak, pinyon-juniper, and aspen woodlands from 5,000 up to 10,500 feet, per Cornell's life history account, which adds that at those heights, nighttime temperatures regularly plunge below freezing even in the middle of summer. That is a genuinely narrow niche among US hummingbirds. The breeding range runs through the Rocky Mountains and the Southwest, with populations reaching into California and west Texas, per the Audubon Field Guide. At the range's northern edge, the Montana Field Guide describes the species as uncommon and confined to montane habitat in the south-central and western part of the state, with every documented sighting falling in May, June, or July. Inside Rocky Mountain National Park itself, the National Park Service reports the species is abundant from May through the end of summer, which lines up with the breeding window elsewhere in its range.
Timing follows the elevation. Per the Audubon Field Guide, Broad-tailed Hummingbirds move north early for a mountain-breeding species, many arriving by early March, and head south again by early August, with males typically departing before females and juveniles in both directions. For how that kind of long, elevation-driven migration actually plays out day to day, our hummingbird migration guide covers the mechanics in more depth. Wintering birds move into Mexico's pine-oak forests, dry thorn forests, and tropical highlands, per Cornell's life history page, before starting the climb back into the Rockies the following spring. The freezing overnight temperatures on the breeding grounds are exactly why nightly torpor, a controlled drop in heart rate and body temperature to around 54 degrees Fahrenheit when it is below 44 outside, is not optional for this species the way it might be for a lowland hummingbird. At 10,000 feet, it is a nightly requirement, not a backup plan.
Territorial at the Feeder, But Not Always the Winner
Broad-tailed Hummingbirds are genuinely aggressive defenders of a good feeding spot. Cornell's overview describes a single male making more than 40 chases per hour defending a feeder from other birds. That said, the Broad-tailed does not always win. Cornell's own life history account of the Rufous Hummingbird, widely regarded as one of the feistiest hummingbirds in North America, notes that during brief migration stopovers, Rufous Hummingbirds "may chase off resident Broad-tailed, Broad-billed, Violet-crowned, and Black-chinned hummingbirds" from a feeder. Our guide to the hummingbird species you will actually see in the US covers that dynamic across more species. The short version here: a Broad-tailed holding a mountain meadow territory all summer can still get bumped off its own feeder for a week or two whenever Rufous Hummingbirds pass through on their own migration.
A Common Species Worth Paying Attention To
None of this makes the Broad-tailed Hummingbird rare. The Audubon Field Guide puts the global population at an estimated 9.8 million birds, a healthy number for a species with such a specific, high-altitude habitat requirement. The same source notes recent survey data pointing to population declines, which is worth sitting with for a moment: a species does not need to be scarce today to be worth tracking closely, especially one whose entire breeding range depends on mountain meadows and flowering shrubs at 5,000 feet and up. Habitat that shifts with a warming climate, drought, or changed fire patterns in the Rockies and Southwest has fewer places to retreat to when the bird in question is already tied to a narrow elevation band. Longevity data adds a useful frame here too: banding records cited by Cornell put the oldest known individual at over 12 years, 2 months old, a genuinely long life for a bird that weighs about as much as a couple of paper clips and makes that elevation-driven round trip to Mexico and back nearly every year of it.
Frequently Asked Questions
How do you identify a Broad-tailed Hummingbird?
Listen first: males produce a loud, insectlike, metallic trill during ordinary flight, a sound distinctive enough to identify the species before you see it. Confirm visually with a rose-magenta throat on males, spotted cheeks on females, and a tail that extends past the wingtips on both sexes, a shape most other US hummingbirds do not share when perched.
What does a Broad-tailed Hummingbird sound like?
Its wings produce a loud, metallic trill that Cornell Lab's All About Birds compares to the sound of a cricket zooming around in flight. Unlike the courtship-dive sounds of some related species, this trill happens during normal, everyday flight and is produced specifically by males.
What is the difference between a Broad-tailed and a Rufous Hummingbird?
Broad-tailed is slightly smaller overall, and its tail is the more reliable clue: female Broad-taileds have a tail that extends well beyond the wingtips and show grayer cheeks with a white eyering, while female Rufous Hummingbirds have a shorter tail that barely clears the wings and lack that eyering.
Do Broad-tailed and Ruby-throated Hummingbirds ever overlap?
Not during the breeding season; Cornell's range comparison notes the two species do not overlap geographically at that time of year. Where ranges come close, check the face rather than the throat: male Broad-taileds show a thin white line between the eye and throat, while male Ruby-throateds show a dark eye patch instead.
When do Broad-tailed Hummingbirds migrate?
Many arrive on their high-elevation breeding grounds by early March and head south again by early August, with males typically traveling before females and juveniles in both directions. Wintering birds move into pine-oak forests, dry thorn forests, and tropical highlands across Mexico.