Spring: The Reedbed Finds Its Voice

By late February the reedbed is still all straw and whisper, but something has changed underground. New shoots are pushing through the litter, and with them comes the first real sound of the year: the boom of a male bittern. It is a deep, breathy note, somewhere between a foghorn and someone blowing across a milk bottle, and on a still, damp morning it carries a kilometre or more. Stand at the edge of the reeds, not inside them, and give it time — a booming bittern may stay silent for ten minutes between calls.

March and April bring the arrivals. Reed warblers chatter up from sub-Saharan Africa and immediately begin their scratchy, rhythmic song from last year's stems. Sedge warblers are noisier still, hurling out a jumbled medley of mimicry from the scrubby margins. Listen for the explosive, almost startling burst of a Cetti's warbler — a bird you will hear a hundred times before you see it. And keep an ear out for the thin, bell-like ping of bearded tits, which often gives away a pair moving through the reed heads before your eyes find them.

Late Spring and Early Summer: Nesting Season

Through May and June the reedbed is at its busiest and its most secretive. Reed warblers weave their deep, basket-like nests around three or four upright stems, often just a metre or two above the water. Cuckoos target them heavily, so a reedbed with plenty of warblers is also a good place to watch a young cuckoo being fed by its tiny foster parents in July.

Above the reeds, marsh harriers tell a different story. Watch for the male's food pass — a mid-air handover where the female rolls upside down to take a bundle of prey. In a good year, young harriers fledge from late June and spend weeks practising clumsy stoops over the reed tops. Bearded tits, meanwhile, are feeding young on insects deep in the stems, and the family parties that emerge in midsummer are often the easiest of the year to see.

High Summer: Fledglings, Hobbies and Haze

July and August are warm, green and often maddening with insects. Go early, wear long sleeves, and accept that a head net is not overkill. The rewards are real: hobbies scything over the reedbed and taking dragonflies on the wing, water rails beginning to call from the wet ditches, and young reed buntings flicking along the tops of the stems. This is also the season for patience at dusk, when bitterns make their short, low flights between feeding pools and roosting spots.

If you have access to a pool or dyke beside the reeds, scan it quietly for a kingfisher, a feeding little egret or a family of grebes. Many reedbeds are best understood as a mosaic — open water, wet grassland, scrub and reed — and the birds move between all four.

Autumn: Passage Birds and the Grit Trays

September turns the reeds tawny and the visitor list unpredictable. Sedge warblers and most reed warblers slip away south, and in their place come passage birds: green sandpipers on muddy edges, snipe and ruff on damp pools, and occasionally something rarer — a spotted crake or an aquatic warbler if you are very fortunate. It is worth checking any quiet, well-vegetated corner after a night of easterly winds.

October and November are prime bearded tit months. As the birds switch to a diet of reed seed, they need grit to grind it, and at many wetlands they gather at purpose-built grit trays on the edges of the reeds. Early morning on a calm, bright day is best — sit still and let them come to you.

Winter: Roosts, Frost and Murmurations

Winter is the reedbed's quietest season for song and its best for spectacle. Starlings pour in at dusk in December and January, swirling over the reeds before dropping in with a roar like heavy rain on a tent. Marsh harriers gather to roost, sometimes a dozen or more, drifting in low over the reeds in the last half-hour of light.

Hard frost is your friend. When the edges of pools freeze, bitterns are forced to feed in the few remaining open channels, and a patient watcher at a reedbed edge can be rewarded with extraordinary views of a bird that is usually invisible. Listen too for the pig-like squeal of a water rail, and watch bearded tit flocks feeding on frosted reed heads, their long tails cocked.

Practical Notes for a Year of Reedbed Watching

• Go early. The first two hours after sunrise produce the most song and the most movement, whatever the season.
• Use the wind. Walking with the wind behind you keeps your scent and sound moving away from the birds ahead of you.
• Learn the sounds. A reedbed is a place to listen first. Download a few calls and practise before you go.
• Take binoculars and a scope. The best views are usually across open water to a distant reed edge, not from within the reeds.
• Stay on paths and hides. Disturbance at a bittern roost or a harrier gathering is easy to cause and hard to undo.

Return to the same reedbed in each season and you will build something better than a list: a sense of how a single place breathes through the year, from the first boom in February to the last starling in January.