Why Canals Are Britain's Best-Kept Wildlife Corridors

The quiet rhythm of canal life makes the towpath one of the finest places in Britain to watch wildlife. Because boats move slowly and the water is sheltered by hedgerows, reeds and mature trees, creatures that would scatter elsewhere often carry on as though you aren't there at all. A narrowboat at tickover is far less disruptive than a car, a cyclist or even a brisk walker, which is why so many boaters keep a pair of binoculars within easy reach of the tiller.

The trick is knowing what to look for, where to look, and when. Early morning and the last hour before dusk are reliably the best times, and the stretches where the offside bank – the one without the towpath – is left to grow wild tend to hold the most life. Here's what you might reasonably expect to see on a quiet cruise along the cut.

The Kingfisher: A Flash of Electric Blue

Nothing lifts a grey morning like a kingfisher. You'll usually hear it before you see it – a sharp, high-pitched whistle that's easy to learn, followed by a streak of brilliant blue and orange flying low and fast along the water. They favour overhanging branches where they can sit and watch for small fish, so scan low perches over a clear, slow-moving stretch.

When they do land, they often bob their heads while sizing up a meal. Give them space and a slow, steady approach and they'll frequently stay put. Mooring overnight near a quiet bend with good tree cover is one of the simplest ways to improve your chances, and they're present on most canal networks year-round.

Herons, Egrets and the Patient Hunters

Grey herons are the statues of the waterways – tall, hunched and utterly still until they strike. You'll see them standing in the shallows or on a lock gate, often looking faintly disapproving of your passage. They fly with slow, heavy wingbeats and a folded neck, quite unmistakable once you know the shape.

Look, too, for the smaller white birds that have spread steadily across lowland England:

• Little egret – pure white, black legs and bright yellow feet, often feeding in the margins.
• Grey wagtail – not a heron, but a constant companion at locks, bobbing on the gates and flashing a long tail.
• Cormorant – often seen drying its wings with them held out like a cloak on a post or piling.

These birds take fish, so a stretch with good water clarity and plenty of small fry will usually hold one or two.

Dragonflies, Damselflies and the Summer Fringe

From late May through to September, the fringes of canal vegetation come alive. Dragonflies patrol the open water while damselflies flit among the iris and reeds. You can tell them apart at a glance: dragonflies hold their wings open and flat when resting, damselflies fold them back along the body.

The best spots are the warm, sheltered, sunlit margins near a lock or a winding hole where the water is still. Brown hawkers and emperor dragonflies are the two you'll most often see shooting past the bow, and the electric-blue banded demoiselle is a real prize on southern and western waterways. Bumblebees working the comfrey and purple loosestrife along the bank are a reassuring sign that the stretch hasn't been over-tidied.

Water Voles: The Real Indicator of a Healthy Cut

The water vole is the species that tells you a canal is in good order. It's the animal most people picture as "Ratty" from The Wind in the Willows – blunt-nosed, round-eared and short-tailed, quite unlike the pointed brown rat. A classic sighting is a sudden plop as one dives from the bank, or a "vole-sized" bow wave as it swims across the cut.

Water voles need soft, unlined banks with plenty of tall vegetation to burrow into and feed on, so they're most likely on stretches left to grow wild. Look for their field signs:

• Burrows – round holes about the size of a tennis ball just above the waterline.
• Feeding stations – little piles of nibbled stems cut at a neat forty-five degrees.
• Latrines – small mounds of droppings used to mark territory along the bank.

Keep your distance, stay quiet, and never let a dog swim into a burrow-rich bank.

Otters, Bats and Things You'll Hear Before You See

Otters are returning to many canal networks, especially where rivers and canals meet, and a dawn sighting of one fishing a lock cut is unforgettable. Look for spraint on flat stones and listen for a distinctive whistling call. Bats are far easier: on any mild evening from spring to autumn, Daubenton's bats skim low over the water hunting insects, while pipistrelles flick around the trees.

A few habits make all the difference. Keep the engine quiet on the straight stretches, switch off unnecessary lights at dusk, and always give nesting and basking spots a wide berth. Take a notebook – recording what you see and where gradually turns a pleasant cruise into a genuine survey of your local cut.