Birding by ear for beginners: how to hear birds you cannot see

Birding by ear means identifying a bird from its song or call instead of its feathers, and it turns a noisy tree into a list of names. Listen for five things: pitch (high or low, rising or falling), rhythm (how the notes are grouped), repetition (how many times a phrase repeats), tone (whistled, buzzy, nasal, flute-like) and length. Learn two or three common yard birds first, find the singer by turning your head and moving a few steps, and write down or record what you heard while it is fresh.

Why you hear birds before you see them

Leaves are the first problem. A bird can sit motionless in a summer canopy ten feet above you and stay invisible for an hour while its song reaches you perfectly well. The Red-eyed Vireo is one of the most numerous summer birds in eastern North America, sings from first light to late afternoon, and spends nearly all of that time in the treetops where almost nobody sees it. The Ovenbird shouts teacher, teacher, teacher from the forest floor and stays hidden anyway.

Time of day is the second. Birds are most active and vocal early in the morning, and much of the singing happens around sunrise, when the light is too dim to pick out a small brown shape. Then there is distance and habitat: a rail in a marsh, a tanager in the crown of an oak, a pipit passing overhead. For some look-alike pairs, such as Eastern and Western Meadowlarks, voice is the clearest way to tell them apart at all.

The five things to listen for

Experienced ear birders are not hearing something you cannot. They have learned to break a sound into parts. Five parts cover most of it.

Pitch

High or low, and does it rise, fall or stay level? A Mourning Dove coos low and mournful. A chickadee whistles high and clean, and its song is the best first lesson in pitch because it is only two notes.

Rhythm

How are the notes grouped? Evenly spaced, in bursts, speeding up? The Song Sparrow has a rhythm you can count.

Repetition

Some birds say a thing once. A Northern Mockingbird repeats each phrase three or more times before switching to a new one. A Red-eyed Vireo repeats short phrases for hours with barely a pause.

Tone

The texture of the sound: clear whistle, dry trill, buzz, rasp, nasal honk, flute. A Common Grackle sounds like a rusty hinge. A Chipping Sparrow sounds like a sewing machine. A Wood Thrush sounds like a flute in a stairwell.

Length

How long does it go on? A dove's coo is a few slow notes. A House Wren pours out a long bubbling run that rises and tumbles down. With all five qualities noted, you have enough to look a sound up, and enough to recognize it next time.

How to find the bird that is singing

Seeing the singer is optional, but it is how a song gets attached to a face in your memory.

1. Turn your head, do not hold it still. Your brain places a sound by the tiny difference in when it reaches each ear, and it does this far better for sounds in front of you than beside or behind. Face where you think the bird is, turn a little each way, and check that the sound stays put. Turning also fixes the classic confusion of a bird that seems to be behind you when it is in front.
2. Cup your hands behind your ears. It looks silly and it works: a bigger collecting surface gathers more sound from ahead and less from the road behind you.
3. Triangulate. From one spot, note a landmark along the line of the sound. Walk ten or twenty feet sideways, at a right angle to that line, and take a second bearing. Where the two lines cross is the bird.
4. Tilt for height. Facing the sound, lean your head toward one shoulder so your ears sit one above the other. The same left-right sense now tells you how high the bird is.
5. Wait. A bird singing from one spot is usually on a favorite perch and will stay for several minutes.

Habitat narrows the search before you start: towhees sing from brushy edges, vireos from the treetops, blackbirds from a cattail. After a few weeks you will look at the right height before you have decided to.

How to remember what you heard

The sound will be gone from your head by lunchtime unless you pin it down. Three tools:

• A mnemonic. Match the rhythm to a phrase in English: Peter, Peter, Peter for the Tufted Titmouse, teakettle, teakettle for the Carolina Wren, who cooks for you for the Barred Owl. Published phrases are a start; the ones you invent stick better.
• A voice memo. Your phone's recorder is enough. Say the date, the place and your guess, then hold the phone toward the bird for thirty seconds. It will not be a clean recording, but you can play it next to a reference recording at home, which is where most of the learning happens.
• A notebook. Write the five qualities in your own words: high thin trill, one pitch, two seconds, top of a spruce. A log of what you heard and when also shows you the year turning.

Then be disciplined about how many birds you take on. Start with two or three of the commonest birds around your house, learn all of their sounds including the calls, and only then add the next one. Know the American Robin cold and half the unfamiliar sounds in the yard become "not a robin," which is progress.

Gear you do not need

None, really. Binoculars help you confirm the singer, but the point of ear birding is that they are optional. You do not need a parabolic microphone, a field recorder or a hearing device. You need a window that opens, a chair outside at 6 a.m. in May, and fifteen minutes of sitting still.

What a sound-ID app can and cannot do

Sound identification on phones has become very good. Merlin Bird ID, the free app from the Cornell Lab of Ornithology, names several hundred North American species from a live recording, even with more than one bird singing, and shows a spectrogram as it goes, so you see the shape of the song while you hear it. Warble does the same job in game form, naming the bird while it sings and turning each species into a card you keep, which is a decent way to make yourself go outside every morning.

What no app does is learn the song for you. A phone tells you what sang; only repetition tells you what it sounds like. Apps also struggle where you would: wind, traffic, a distant bird, two similar species at once. A skilled human ear still beats them. Get the name, close the app, and listen to the bird for another minute. That minute is where the skill lives.

Get Warble free

Questions people ask

Warble is a game, not a field guide. Where this page states a fact about a bird, it comes from the sources above.