Nearly one hundred percent of the air passing through a bird’s vocal cords is used to make sound. Humans use only about two percent.

Don Stap, Birdsong

Do you remember that day, years and years ago, catching the train to the mountains? A hazy morning, mist in the valleys. Do you remember the songs of the forest and the silences between us?

I remember accepting your invitation. I can’t recall the actual conversation, but I can still feel the friction in the air after you asked me. We were in one of those dusty spaces outside the lecture theatres: less of a foyer, more like a holding pen. Waiting to go in or loitering afterwards, I can’t remember. I remember your question lingering, my need to answer it, my fear of answering. I remember the dust settling when I consented.

It was a weekday, so the train was almost empty. Uni students have all the time in the world. A few figures haunted the far end of the carriage. The train chatted over the tracks. I couldn’t think of anything to say. An incomprehensible voice fuddled the names of the stations as we rattled through the outer suburbs and clambered our way up the mountain. When we arrived, the carriage doors chirred open and we stepped out into a shrieking-cold day.

We straggled our way down the main street to the tourist lookouts, passing steamed-up cafes and lumbering beanie-clad pensioners. You were well-prepared for the weather: gloved, and snug in your pleated coat. I put on a brave face in my worn-down duffle jacket. You asked me if I was okay. I squeezed my elbows into my ribcage.

At the cliff tops we were accosted by the grind and hiss of buses and the breakneck shouting of school kids. The children slapdashed around us, sucking in the chilled air, puffing out plumes of white. They proclaimed—to us, to the buses, to no one in particular—that there was nothing to see. They were right. The mist had settled in and there was an empty space where the Three Sisters should be. A pipsqueaking ten-year-old coo-eed into the void. There was no echo.

We weren’t there for the view, you said. You knew the way. You led me past the ruckus and found the track to the stairs into the valley. Well, ladders, really: metal frames bolted into the sandstone. You slivered past crumbling rock and disappeared. The icy-sharp railing blanched my palm. I didn’t look down. I breathed in the shrill air and followed. The cliff was smeared with moss, sharp horizontal lines. Ashy sediments marking the millennia. I could hear your boots tinkling against the metal rungs. I looked down the precipice. There was a flicker of movement on the ladder even lower, a clang and a clatter of laughter. I saw you hesitate and then squeeze yourself into a flinty niche. A snippet of conversation wafted up: words like morning, weather, stunning. When the parka-clad figures clambered past me, I opened my mouth. I meant to say hello, but no sound came out.

Halfway down the cliff—a stratum of silence. Above, the hackling tourists and growling buses. And below—

You were waiting for me in the sandstone alcove. You told me to listen.

I listened.

The broom wheezes through the darkness. The fractured bark muffles the air, like dust.

And then the other call. Or calls, you might have said. Harmonious with the quiet chiming rhythms, working as a counterpoint. A slow softness at first, like a lyrical cicada: increasing intensity, until unwavering and clear. It felt mobile, like it came from nowhere and everywhere, a siren whirring down a city street. It thrummed through our bodies. Then, Doppler-like, the sound changed: a sudden lash, then silence. We waited. A palpable silence. A minute, two minutes later, the siren bent the air from another angle; another slap as the sound cracked off.

We sat on the dewy rocks. The fuzzy moss tousled the hair on my fingers.

This is what I wanted you to hear, you said.

Or you might have said. I can’t remember.

I huff, exhausted, against the chiselled bark.

Do you remember the journey home? Outside the train, the daylight dimming; inside, the fluoro lights flickering on. Under the quiet light, you let my knee move towards yours. You turned your head and looked at me.

Do you remember the koel last night? Crying into the void, waiting for a response.