Exploring estuary habitats by canoe at low tide

Why the falling tide is the estuary's finest hour

Anyone who has paddled an estuary knows the strange arithmetic of tide. At high water you get a wide silver mirror and very little else; at low water the mirror drains away and the estuary shows you its working parts. Mudflats glisten, sandbars appear like the backs of sleeping animals, and channels braid and rebraid across ground that was sea an hour ago. It is untidy, faintly industrial, absolutely alive.

For a canoeist, low tide is the honest version of the place. It also happens to be when the birds arrive. As the water pulls back, invertebrates rise towards the surface of the mud, and wading birds follow the retreating edge to feed. Get your timing right and you can drift within a hundred metres of a flock of curlew, watch them probe with those improbable bills, and never once disturb them.

Reading the tide before you read the birds

The golden window is roughly two to three hours either side of low water. Before that the current is still running hard; after it the flood returns and the mudflats vanish quicker than you expect. Check the tide table for your chosen estuary and note the height as well as the time – a low water of 0.4 metres exposes vastly more mud than one of 1.6 metres.

Neap tides are your friend. The range is smaller, the currents gentler, and the window of easy paddling longer. Spring lows expose the most feeding ground, but they also empty and refill the estuary at a startling pace. On a big spring tide you may find yourself a kilometre from the nearest deep water with twenty minutes to spare.

Local knowledge matters more here than almost anywhere else. Estuaries silt, channels shift, and the sandy-looking shortcut that worked last spring may be a knee-deep trap in October. Ask at the harbour office, or better, paddle with someone who knows the water. If the estuary has a designated launch point or a local club, use it.

Setting off quietly

Sound carries over water, and waders are quick to respond to a splash, a dropped paddle or a shouted instruction. Launch on a rising or slack moment if you can, when the birds are already settled and less watchful.

• Load the canoe low and stable. A heavy pack on a thwart makes for clumsy strokes; heavy kit goes on the floor, amidships.
• Use a single, slow stroke. Bow rudders and gentle J-strokes keep you tracking without the clatter of switching sides constantly.
• Drift where you can. Riding the ebb down a channel with the paddle resting across your knees is both restful and nearly silent.
• Keep your distance. Aim for at least 150 metres from any feeding flock, and never paddle between birds and the shore they are feeding towards.
• Binoculars beat paddling closer. A pair of 8x42s will show you more of a curlew's feeding behaviour than a close approach ever will.

Who you will meet on the mud

Different birds use the estuary in different ways, and knowing which is which makes the paddle far richer. Curlews and black-tailed godwits probe deeply in the softer mud of the lower shore. Oystercatchers hammer at mussel beds and cockle shells, easy to spot in their black-and-white livery. Redshank and dunlin work the shallower edge in restless, wheeling flocks. Shelduck dabble in the channels, and in winter you may find brent geese grazing the saltmarsh rather than the mud.

Watch for the sentinels. A single lapwing or a nervous redshank going up first is often the signal that something – you – has been noticed. If birds lift and circle before settling again, you have pushed them off their feeding. Back off, hold still, and let them return. Feeding is expensive for a wader in winter; every unnecessary flight costs energy they cannot easily replace.

Nordic-inspired comfort for cold coastal days

There is a whole tradition of enjoying cold coasts well, and it comes down to three things: wool, warm drinks and shelter. Dress in layers you can shed once you are working, with a merino base under a windproof shell, and keep a dry bag with a spare fleece, hat and gloves within reach.

• A thermos of something hot. Coffee, tea or a spiced blackcurrant cordial, taken while sitting still on a sandbar, is half the point of the trip.
• A small sit pad or folded blanket. Mudflats are cold, and a dry seat makes a rest stop something you look forward to.
• A compact tarp or windscreen. A modest shelter lets you linger on the shore after landing, watching the last of the light on the water.
• Wool gloves with the fingers cut off, or thin liner gloves, so you can use binoculars without fumbling.

Leaving the estuary as you found it

Stay off the mud where you can. Estuarine mud is both a wildlife habitat and, in places, genuinely dangerous to walk on – it can hold a boot or a leg with surprising force. Land only on firm sand, shingle or slipway, and never drag a canoe across a mussel bed.

Take everything home, including the bit of orange peel you nearly dropped. On the water, keep well clear of moored boats, oyster trestles and any marker posts that suggest a fishery. And leave the birds in peace: no landing on roosts, no chasing a photograph, no quiet approach that turns into a close one.

Paddle home on the flood if you can, riding the tide back up the channel as the mudflats drown again. The estuary will look entirely different on the return leg – fuller, softer, a little secretive. That is exactly as it should be. Come back on the next neap low, and it will show you something else entirely.