Keeping a Nature Journal of Riverside Observations

Why the River Rewards a Written Record

A river is never the same twice. The level drops a few centimetres overnight, a fallen alder shifts the current, the first sand martins appear over the shallows, and a week later it has all changed again. Most of us hold such details for a day and then lose them. A nature journal is simply a way of keeping them. Keep one for a single season on one stretch of water and you will know that patch better than most people know their own garden.

The rewards accumulate quietly. The first time you notice a grey wagtail bobbing on a weir lip it is a pleasant surprise; the fifth time, in the same week of the same month, it is a pattern. That shift — from noticing to understanding — is what a journal is for.

Four Things to Note on Every Visit

You do not need to record everything. Four observations, made in the same order each time, will give you more than a page of scattered impressions.

• Water level and flow. Pick a fixed reference — a particular stone, a gauge board, the third step of a weir — and describe the water against it. "Halfway up the second step" tells you far more than "high". Note colour and clarity too: peaty brown after rain, clear and low in a dry spell.
• Weather, including what came before. Current conditions matter, but so does the previous day. Heavy rain upstream can raise your river while your own sky stays blue. Note wind direction as well; it changes where birds sing and how far sound carries.
• Birdsong and behaviour. Which species are singing, how many, and at what time. A song thrush at 5.40am in April is a different entry from the same bird at 7.15am in June. Record first and last song of the season, plus any alarm calls or displays.
• Plant changes. Bud burst, first leaf, first flower, first seed. Cow parsley along the towpath, meadowsweet in the damp hollows, Himalayan balsam on the shingle. Note where the edge of each species sits, because it will move.

Write the date, the time and the place first. An undated entry is nearly useless a year later.

Sketching Without Being an Artist

Forget about drawing well. A sketch is a form of note-taking, not a picture. Two or three lines capturing the silhouette of a heron against the far bank will do more for your memory than a paragraph, because you have to look properly to make them.

Keep it small and quick: a thumbnail the size of a postage stamp, drawn in under a minute. Note the proportion of beak to head, the angle of a wing, the shape of a leaf margin, then write beside it what you cannot draw — the call, the movement, the light. Mud is a gift for this. Footprints of otter, deer and heron are crisp and easy to trace, and the nibbled stems of water vole, cut at an angle like a pencil sharpened with a knife, are unmistakable.

If you are unsure of an identification, write what you saw rather than what you think you should have seen. "Small brown bird, dipping tail, on the mill race" is a perfectly good entry, and someone will help you name it later.

Reading the River's Own Calendar

After a few months your journal begins to answer questions you had not thought to ask. When did the chiffchaff arrive this year compared with last? How many days between the first alder catkins and the first frogspawn in the side channel? Did the kingfisher hold the same territory through the winter?

Phenology — the study of seasonal timing — is where a riverside journal earns its keep. Rivers are sensitive, and their inhabitants respond quickly. A mild January, a late frost, a summer spate: all of it shows up in your pages. You will also build a record of the river itself, noting the date it last flooded the footpath, the day the shallows ran dry, the week the weed began to die back.

Choosing a Patch and Keeping the Habit

Pick somewhere within walking distance, because the journal only works if you actually go. A quarter-mile of bank is plenty. Walk it in the same direction at roughly the same time of day, varying the time occasionally to catch the dawn chorus and the dusk flight.

Ten to fifteen minutes is enough. Sit still at one spot for five of them — the birds and mammals you most want to see are the ones that appear once you stop moving. Aim for once a week and do not fret about gaps. A journal with gaps in it is still a journal.

Kit, Practicalities and Staying Safe

A small notebook that fits a coat pocket, a pencil rather than a pen (pencils work when wet and do not run in the rain), and a waterproof bag to keep them in. A hand lens is a joy for leaves and insects, and a phone camera is a useful backup for anything too quick to draw — just write the note as well, because a photograph alone will not tell you what the water was doing that day.

Wear wellingtons or grippy boots and treat riverbanks with respect. Mud and wet stone are treacherous, and water levels rise faster than people expect, particularly after rain in the hills above you. Tell someone where you are going if you plan a remote stretch, keep back from the edge of a spate, and never wade for a better view. Look after the habitat as well as yourself: stay on the path where banks are eroded, keep dogs out of the water in the spawning season, and take everything home with you.

The best journal is the one you keep. Start with today's date, a water level, and whatever is singing.