Written by the team behind Puzzlify. Puzzlify is our product, so weigh what follows with that in mind. We've tried to make this useful even if you never use it. We're not affiliated with any river clean-up group, river warden scheme, rivers trust, waterkeeper, angling club, environment or water agency, water company, wildlife trust, citizen science programme, landowner, school, parish or town council or conservation organisation. Nothing here is legal, health and safety, water safety, wildlife, environmental, safeguarding, copyright or data protection advice; check your own group's guidance on gifts, photos, water, sharps, land access and members' details.
It's half past nine on a cold Sunday morning in March, and a retired midwife called Pauline is standing in the car park of a riverside pub, before it opens, handing out litter pickers from the boot of her estate car. She has twenty of them, bought with a small grant three years ago, along with a box of thick gloves, a roll of heavy-duty bags, a bucket with a lid for anything sharp, a first aid kit, two throw lines, a clipboard and a flask of coffee. The landlord has said they can leave the full bags by his bins, and the council has promised to collect them on Tuesday.
By ten o'clock there are sixteen volunteers spread out along a mile of riverbank, in wellies and hi-vis vests, working in pairs. Pauline gave the safety talk in the car park: stay on the bank, never go into the water, never reach for anything you can't reach easily, never pick up a needle or anything sharp, call her instead, and wash your hands before you touch your sandwiches. A volunteer called Kofi is pulling crisp packets and drinks cans out of the brambles below the footbridge. Two sisters in their seventies are working along the fence line by the playing field, filling a bag every twenty minutes. A teenager on his Duke of Edinburgh volunteering is carefully freeing a tangle of fishing line from a willow branch, with his dad holding the bag.
Further downstream, in a pair of chest waders and a life jacket, a trained volunteer called Ellie is standing in a shallow gravel run with a net, doing the group's monthly riverfly survey. She kicks the gravel for exactly three minutes, empties the net into a white tray, and counts the tiny creatures wriggling in the water: mayfly nymphs, caddis larvae in their little stone cases, freshwater shrimp. The numbers go on a form and then into a national database, and if they ever drop suddenly, it's an early warning that something has gone wrong in the river.
At one o'clock, everybody meets back at the car park with forty-three bags of rubbish, two shopping trolleys, a traffic cone, a bicycle wheel, a garden chair and a road sign, all lined up for a photograph with no faces in it. Pauline counts the litter pickers back into her boot, the landlord brings out a tray of tea, and the river runs a little clearer past the pub.
If you've ever walked along a riverbank and noticed it was cleaner than it used to be, seen a line of full bags waiting by a bridge on a Sunday afternoon, or watched someone in waders counting tiny creatures in a white tray, you've seen the work of river clean-up volunteers and river wardens, whether you knew it or not. This guide is about saying thank you to them, in words first and, if it fits, with a small digital jigsaw made from a photo of the river they look after.
Who we mean
River clean-up groups come in many forms. Some are "friends of" a particular river or stream; some are river warden or river ranger schemes run with a rivers trust, a council or a conservation charity; some are angling clubs that look after their stretch of water; some are paddlers and kayakers who clean up from the water as well as the bank; and some are neighbours who got fed up with the litter by the bridge and started doing something about it. Almost all of them depend on volunteers. You'll usually find:
- the organiser or the warden coordinator, who plans the clean-ups, gets the permissions, does the risk assessment, gives the safety talk, books the collection and counts everyone back at the end;
- the litter pickers, who work along the banks, under the bridges and through the brambles, a bag at a time;
- the trained water volunteers, who go into the river in waders or boats only with proper training and safety cover, to pull out trolleys, tyres and heavier items;
- the river wardens and patrol volunteers, who walk a stretch regularly, report pollution, fly-tipping, damaged banks and anything unusual to the right people, and keep an eye on the river between clean-ups;
- the citizen scientists, who do the riverfly surveys, test the water for nitrates, phosphates and temperature, and record what they find, month after month;
- the habitat volunteers, who pull invasive plants such as Himalayan balsam in summer, plant trees and reeds along the bank, and help with fencing to keep the banks from crumbling;
- the kit and tool volunteers, who look after the litter pickers, the gloves, the waders, the throw lines and the sharps bucket;
- the secretary, the treasurer and the grant writers, who deal with the insurance, the bank account, the funding and the training records;
- the landowners, the farmers and the businesses, who give access, store the bags, lend a trailer or bring out the tea;
- the people who started it, or kept it going, who organised the first clean-up, bought the first box of litter pickers, or refused to let the group fold when numbers were low.
And behind all of them, the partners and families at home who have learned that a Sunday morning means a muddy boot, a pile of wet gloves on the radiator and a story about the strangest thing anyone pulled out of the river.
The words matter most
Before anything else, it's worth saying: the thank-you that most river volunteers remember is the one that tells them exactly what they did and why it mattered. "Thanks for all your hard work" is kind. "Thank you for clearing the bank below the footbridge; my children played there all summer and I didn't once have to worry about broken glass" is the one that gets kept.
If you're not sure what to say, these questions might help:
- What did they do that you saw, or that you only found out about later?
- What did it make possible: a footpath you enjoy walking, a stretch where the kingfisher came back, a pollution problem that was spotted and reported in time, a child who learned what lives in a river?
- What will you remember about that stretch of water, that bridge or that bend in the river because of them?
A few honest sentences, handwritten or typed, are worth more than any present. Everything else in this guide is optional.
Who might send one
A photo jigsaw is not right for everyone, and it doesn't replace a card, a handshake in the car park or a thank-you at the group's annual meeting. It tends to suit:
- an organiser or a warden coordinator who is handing over the role after many years;
- a river warden who has walked the same stretch every week, in all weathers, and reported every problem;
- a citizen scientist who has done the monthly riverfly survey or the water tests for years;
- a whole group, as a shared thank-you after a big clean-up, at the end of the season or on the group's anniversary;
- a volunteer who has just done their first clean-up, finished their riverfly training or led their first litter pick;
- a landowner, a farmer or a business that has supported the group for years;
- a partner or family member who has supported someone through years of early starts and wet Sundays.
It's less suited to someone who doesn't use screens at all, or who would feel awkward about a gift. In those cases, a card and a warm word over a cup of tea are perfect.
Gifts, rivers and good manners
Most river groups run on very small budgets, and the work has real risks. A few things to keep in mind:
- Group money: if you're thinking of a thank-you paid for from the group's funds, check with the committee first. Grants and donations are usually meant for equipment, training, insurance and skips, and funders may have rules about how they're spent.
- Paid staff and officers: some clean-ups are led by paid rivers trust officers, rangers, council staff or water company staff, and their employers may have rules about gifts. A card or a free gesture is always safe.
- Water safety: rivers are dangerous, even shallow ones and even on a calm day. Cold water shock, fast currents, slippery and crumbling banks and hidden objects under the surface can all catch people out. Never go into the water, lean over the edge or wade out to get a photo or "help", and leave anything in the water to people who are trained, equipped and covered by the group's safety plan.
- Sharps and hazards: needles, broken glass, chemicals and unknown containers turn up in rivers. Never pick them up; tell the organiser, who will deal with them safely or report them to the right people.
- Hygiene: river water can carry infections. Wear gloves, cover any cuts, keep your hands away from your face and wash them before you eat or drink. If you feel unwell after a clean-up, mention it to a doctor.
- Pollution and reports: if you see pollution, a dead fish or something wrong with the water, report it through the official channels your group uses, not through a puzzle, a gift or social media.
- Wildlife and nesting: banks and reed beds are home to nesting birds, otters, water voles and other wildlife. Don't disturb them for a photo, and never share the location of a holt, a nest or anything rare.
- Children and young people: some groups run family clean-ups, school sessions and youth volunteering. Never photograph children without the right permission, and don't include them in a gift photo at all, even from behind.
- Members' details: keep names, phone numbers, addresses, the group's message group, the rota and the training records private. A thank-you shouldn't share anyone's details.
None of this should stop you saying thank you. It just means keeping it simple and kind.
When to send it
The river year has its own natural moments for a thank-you:
- after a big clean-up day, such as a spring clean, a national or international clean-up weekend or a river festival;
- at the end of the balsam-pulling season, in late summer, when the invasive plants have been pulled before they set seed;
- after a year of riverfly surveys or water tests, when the records are sent off and the results come back;
- at the annual meeting or the end-of-season gathering, when someone hands over a role;
- when someone moves away, steps down or comes to their last clean-up, at whatever time of year that happens.
There's no wrong time to say thank you, but a thank-you that arrives close to the moment it's about tends to land best.
Why a jigsaw can fit
A river clean-up is a jigsaw in reverse. Every bag, every can, every scrap of fishing line, every shopping trolley is one piece taken away, until the picture that was always underneath comes back: the gravel, the reeds, the clear water, the kingfisher on the branch. And a river survey is the same kind of patient work, one sample, one tray, one tiny creature at a time, until the pieces show how the whole river is doing.
So a jigsaw is a small, quiet version of the same pleasure. Putting together a photo of the river they cleaned, piece by piece, with real tab-and-blank shapes that click into place, gives the person a few minutes with a place they've spent many Sundays putting right. And because the note appears when the last piece goes in, the thank-you arrives at the end, as a small surprise, a little like the moment the last bag is tied and the river is clear.
If you're thanking the organiser or the warden coordinator
The organiser carries more than most people see: the permissions, the insurance, the risk assessment, the safety talk, the count of volunteers and tools at the start and the end, the call on a stormy morning about whether it's safe to go out at all, and the patience with a newcomer who wants to wade in after a traffic cone. A thank-you for them might be a photo of the clean riverbank in morning light, or the line of full bags waiting by the bridge, with a note that names something specific: "Thank you for counting us all back every single time, and for the extra gloves when mine went in the river."
If you're thanking the river wardens
River wardens and patrol volunteers are the eyes of the river between clean-ups. They walk the same stretch week after week, notice the oil sheen, the broken fence, the new pile of fly-tipping or the unusual smell, and report it calmly to the right people. A photo of the footpath along the river at first light, a waymark post by a stile, or a footbridge with mist on the water, makes a good puzzle for them, with a note about something they spotted that you didn't.
If you're thanking the citizen scientists
Riverfly surveys and water testing are careful, repetitive and often very cold work, and the results only make sense after months and years of records. A photo of a white sampling tray on the bank, a close-up of the gravel under clear water, a test kit lined up on a rock, or the same stretch of river in every season, is a good image for them. A note that says what changed is even better: "Thank you for every survey. The mayflies came back this year."
If you're thanking the habitat and kit volunteers
The habitat volunteers and the kit volunteers carry the parts of the group that nobody sees on clean-up day: the balsam pulled in midsummer heat, the reeds planted in the mud, the litter pickers mended and counted, the waders checked for leaks. A photo of a heap of pulled balsam on the bank, a row of new trees in their guards along the river, or a neat line of litter pickers and gloves on a tailgate, is a cheerful image for them. Keep number plates, farm names and anything that shows exactly where the kit is stored out of the frame.
If you live with a river volunteer
If your partner, parent or friend is the one who leaves at nine on a Sunday, keeps a litter picker in the boot of the car, checks the river levels on their phone and can't walk past a crisp packet in the hedge, a puzzle can be a small, private thank-you for all the seasons. A photo of their wellies and gloves by the back door, the river they love from the bridge where you always stop, or their favourite bend in the water, with a note that says what you've noticed, can mean a lot.
When a long-serving volunteer steps down
When someone who has been out with the group for many years comes to their last clean-up, a bigger puzzle can mark the moment. A 130- or 252-piece puzzle of the stretch of river they've looked after the longest, or a view from the bridge of a riverbank that looks completely different from the day they started, shared with the volunteers so everyone can add a line to the card that goes with it, is a warm way to say goodbye.
In memory of a volunteer
River groups are often where a community remembers a familiar face on the bank. If a volunteer or a warden has died and their family would welcome it, a photo of the stretch of river they cared for, the bench where they always stopped for coffee, or the view from the footbridge on a quiet morning, can become a gentle puzzle for their family. Always ask the family first, and let them decide whether they'd like it. A quiet note is often enough: "She looked after this river for twenty years. It's still clean."
For river groups elsewhere
We've used words like "river warden", "litter pick" and "riverfly", but the same volunteers exist in many places: friends of rivers, river wardens and rivers trust volunteers across England, Scotland, Wales and Ireland; waterkeepers, riverkeepers and stream clean-up groups across the United States and Canada; Waterwatch and Landcare volunteers in Australia, and stream care and catchment groups in New Zealand; river clean-up days and citizen science water testing across Europe, from the Netherlands and Germany to Spain and Italy; and many more groups around the world taking part in international river and clean-up days.
Whatever the name, the roles are similar: someone plans the clean-up and keeps everyone safe, someone walks the river and reports what they see, someone tests the water, someone looks after the kit, someone keeps the paperwork straight, and someone brings the tea. The guidance here should work for any of them. Check your own group's rules on photos, gifts, water safety, land access and members' details.
Photo ideas and consent
The best photos for a river thank-you are often the quiet ones, taken before the volunteers arrive or after they leave, with no people in them at all. Some ideas:
- the cleaned riverbank in low morning light, with the water clear over the gravel;
- a line of full bags waiting by a bridge or a gate, with the river behind;
- the odd things pulled out of the river lined up on the grass: a trolley, a cone, a wheel, a chair;
- a white sampling tray on the bank with the river behind it;
- a test kit and a notebook lined up on a flat rock;
- a heap of pulled balsam beside a path, or a row of new trees in their guards;
- a footbridge with mist on the water at first light;
- a line of litter pickers and gloves on a tailgate.
Things to keep out of the frame:
- faces, unless the person has agreed;
- children and young people, at any time, including family clean-ups, school sessions and youth volunteering, even from behind;
- walkers, anglers, paddlers and anyone who didn't expect to be photographed;
- homes, private gardens, house numbers, farm names and anything that shows where someone lives;
- number plates and anything that identifies someone's car or the group's trailer;
- anything with a name or address on it among the litter, such as letters, parcels, receipts or prescription labels;
- the names or logos of businesses in a way that blames them, which is a matter for the proper reports, not a gift;
- sharps, needles, chemicals or anything unpleasant;
- nests, holts, burrows and anything rare or sensitive, and any detail that would let someone find it;
- anyone in or near the water, because a photo is never worth a distraction;
- the rota, the sign-in sheet, the training records, the group's message group and the noticeboard with phone numbers;
- anything that might upset someone, such as a photo of a volunteer who has since died, unless their family has agreed.
If the photo has people in it, ask them first. A photo with no people at all, just the river, the bank, the bags or the kit, is often the easiest and best choice.
Getting the JPG right
Puzzlify works from a JPG. Most phone photos are already JPGs, or can be saved as one. A few practical tips:
- rivers look best in soft, low light, early in the morning or late in the afternoon; bright midday sun can bounce off the water and turn it into a white glare;
- tap on the bank or the water to set the exposure, so a bright sky doesn't turn the river dark;
- reeds, ripples, gravel, moss, autumn leaves and the colours of a riverbank make wonderful puzzles, because every piece has a little bit of texture;
- large areas of plain sky or flat, still water are tricky, so crop them or pick fewer pieces;
- landscape images usually make the most comfortable puzzles on a phone turned sideways;
- if your phone saves photos in another format, change the setting to "most compatible" or export a copy as JPG;
- remove location data from the photo before you upload it, especially if it was taken on private land, near someone's home or near anything rare. On most phones, you can switch it off in the share options or the camera settings.
Privacy, an optional PIN, and saying it's from you
The puzzle is private: it's shared as a link, not posted on a public board. You can add an optional PIN so that only someone who knows it can open the puzzle, which is useful if you're sending it to a volunteers' email list or a group chat. Even so, treat the photo as if it might be forwarded, and keep anything private out of it. Puzzlify doesn't use your photos to train AI.
Many river volunteers, especially organisers and wardens who get messages from all sorts of people, are rightly wary of unexpected links. Say who it's from and what it is in the message itself: "This is a little jigsaw of the river after Sunday's clean-up, with a note at the end. It's from me, and it's safe to open." If you're sending it to someone who doesn't use email much, hand it over as a QR code inside a card at the next clean-up.
How many pieces?
| Pieces | Feels like | Typical time |
|---|---|---|
| 24 | a single sampling tray on the bank | a few minutes |
| 48 | a footbridge with mist on the water | around 5–10 minutes |
| 80 | the line of full bags by the bridge | around 10–20 minutes |
| 130 | a long, clean stretch of riverbank | around 20–40 minutes |
| 252 | a whole season of clean-ups, one bag at a time | an hour or more |
If you're not sure, 48 or 80 pieces suits most people on a phone. Keen puzzlers may want the hardest version, but flat water, plain sky and dense reeds get tricky at high piece counts, so start lower if the image has large areas of one colour.
The leaderboard: only for a group
If you're sending one puzzle to the whole group, the optional leaderboard lets everyone see who finished first. Some groups enjoy the rivalry; others would rather solve it quietly with a cup of tea after a long morning. If it's a personal thank-you to one volunteer, you probably don't need it.
A few note ideas
- "To Pauline: every bag, every glove, every Sunday. Thank you."
- "To Ellie: thank you for every three-minute kick, and for showing me my first mayfly."
- "To the river wardens: thank you for spotting the problem and reporting it in time."
- "To the clean-up team: my children played on that bank all summer. Thank you."
- "To my husband: thank you for the muddy boots, the litter picker in the boot and every story from the river."
(Change the names, and keep anything personal or identifying out of a puzzle that may be shared.)
How to make one (about a minute of setup)
- Open Puzzlify's puzzle maker in a browser: https://puzzlify.app/en/puzzle-maker/
- Upload your JPG: the clean riverbank, the bags by the bridge, a sampling tray or the footbridge in the mist.
- Pick a piece count from 24 to 252.
- Write your note. It appears when the last piece goes in.
- Add a PIN if you want one, and preview it for free.
- When you're happy, publish the link and send it by email or message, print it as a QR code inside a card, or ask the group organiser to pass it on.
Honest pricing and notes
Making and previewing a puzzle is free in your browser. You only pay when you publish the link to send it: one credit is EUR 3.99, three credits are EUR 8.99, and Plus is EUR 14.99 a year for ten credits, which can make sense if you want to thank several volunteers separately. The person you send it to doesn't need an account or an app; they just open the link in a browser.
This is a digital jigsaw you play on a screen. It isn't a cardboard puzzle in the post, a printed product or a public puzzle board, and it isn't connected to any river group, rivers trust, warden scheme, agency, water company or citizen science programme. It's also not puzzlify.io (a chess site), Puzzlit, Puzzly or Puzzify, which are different things.
Ideas that are not a puzzle
Honestly, some of the best thank-yous for river volunteers cost nothing at all:
- a handwritten card, handed over in the car park or at the annual meeting;
- stopping to say thank you when you pass a clean-up on the riverbank, and telling them it looks good;
- taking your own litter home, picking up the odd can when it's safe to reach, and keeping dogs out of nesting areas;
- joining a clean-up yourself, even for one morning, after someone has given you the safety talk;
- offering your skills: help with a grant form, the accounts, the website, the data or a lift for a volunteer who doesn't drive;
- a flask of hot soup or a tin of good biscuits for a cold morning by the water, which never fails.
If a photo puzzle feels right as well, choose the clean riverbank in morning light, the bags lined up by the bridge, the sampling tray on the bank or the footbridge in the mist, keep faces, children, homes, plates, names on litter, wildlife sites and anyone in the water out of the frame, pick a piece count and add your note. You only pay if you decide to send it. You can open Puzzlify's photo puzzle maker and try a free preview first.
Whatever you send, the most important part is the sentence that sounds like you, written to the person who handed out the litter pickers from the boot of her car, cleared the brambles under the footbridge, freed the fishing line from the willow, counted every mayfly in a white tray, walked the same stretch every week and reported what they saw, so that next spring, when the kingfisher comes back, the river will be clear enough to see the gravel.
Written by the small team behind Puzzlify (info@puzzlify.app). Not legal, health and safety, water safety, wildlife, environmental, safeguarding, copyright or data protection advice. Check your own group's guidance on gifts, photos, water, sharps, land access and members' details.