# Where your patch counts go when you submit them Your patch counts feed into UK bird surveys like WeBS and BBS — here's the path from notebook to conservation policy. Source: https://glassandfeather.com/posts/where-your-patch-counts-go-when-you-submit-them/ Published: 2026-10-18 --- A notebook with tallies of the birds on your local reservoir, kept through the autumn, contains information that no satellite, no academic field team, and no amount of funding can replicate. The question isn't whether that information has value (it plainly does) but whether it reaches anywhere useful, and what happens to it when it does. The short answer for anyone keeping decent patch records: yes, submit them. The usual advice is that where you submit them, and how you record the data, determines whether your counts feed into population monitoring, conservation policy, or simply vanish into a database that nobody interrogates. ## The schemes that use your counts Several BTO-run programmes form the backbone of structured volunteer recording in the UK, each with its own focus and methodology. ### Wetland Bird Survey (WeBS) WeBS is a monthly count of non-breeding waterbirds at wetland sites across the UK. The count is synchronised so that birds moving between sites aren't double-counted on the same weekend. Counters each cover a defined section of a site, and sections are sized and allocated to suit the geography. What WeBS produces is a time series. WeBS alerts, generated when a site's numbers for a species change significantly against the national trend, are one of the mechanisms by which conservation agencies identify sites that may need reassessment or additional protection. The commitment is real but not onerous: one visit per month, on or close to the set date, covering your allocated section. If you miss a month, the data for that month is simply absent, but consistent coverage across years is what gives the dataset its power. ### Breeding Bird Survey (BBS) BBS measures breeding-season abundance of common and widespread terrestrial species. The transect method and distance-band recording allow the BTO's analysts to estimate detection probability, which in turn allows density estimates rather than raw counts. The figures that result appear in reports like the State of the UK's Birds. Squares in remote areas often go uncovered, and the scheme welcomes volunteers willing to adopt one. ### Garden BirdWatch (GBW) GBW is the simplest of the three. Participants record the maximum count of each species seen in their garden during a chosen weekly recording period. The data builds a picture of garden use by birds across the UK, tracking seasonal patterns and long-term trends in which species are visiting gardens and in what numbers. GBW is a subscription-funded scheme. What it produces is different in character from WeBS or BBS — it's a measure of garden occurrence rather than population size. The well-documented increase of Goldfinch in gardens over the past two decades, for instance, is one trend the scheme has helped to track. ## Usable count vs casual sighting This is where the distinction matters most, and it's the thing that determines whether your existing records can be retrofitted into a survey or whether they're useful only as occurrence data. A usable count has several properties: | Property | What it means in practice | |---|---| | **Complete list** | Every species detected is recorded, not just the interesting ones | | **Effort defined** | The time spent, distance walked, or area covered is known | | **Method consistent** | The same route, the same section, the same approach each time | A casual sighting — "Peregrine over the patch, 14:35" — is valuable as an occurrence record. You saw one Peregrine, but you weren't counting everything else, so there's no way to know whether one Peregrine among a complete count of 47 species means something different from one Peregrine noted while walking to the shop. If you're already recording complete lists with counts, your data is structurally close to what the schemes need. If you're not, the shift is more about discipline than skill. It means writing down the Woodpigeons and the Carrion Crows alongside the scarcer species. ## BirdTrack and eBird: two platforms, different purposes BirdTrack (run by the BTO in partnership with other organisations) and eBird (run by the Cornell Lab of Ornithology) are both free. Both produce maps, charts, and alerts. Many birders wonder whether submitting to both is pointless duplication. It isn't, but understanding why requires looking at what each platform does with the data. ### BirdTrack BirdTrack is the BTO's general recording platform. Records submitted through BirdTrack feed into the BTO's central database. BirdTrack records also contribute to the BTO's migration and breeding atlases and can flag early or late dates, unusual distributions, and range changes. This is worth understanding: if you're submitting complete lists through BirdTrack, your data is already structured in a way that supports trend analysis. Casual records contribute to distribution mapping but not to abundance work. BirdTrack records also flow through to local recording networks. This matters if you care about your county's avifauna having an accurate and complete documented history. ### eBird eBird is global in scope. Its strength is volume: over a billion observations worldwide, with sophisticated tools for visualising abundance, migration timing, and seasonal distribution. For UK birders, eBird's main limitation has historically been sparser coverage compared to BirdTrack. eBird's review system works differently from BirdTrack's. Unusual records are flagged automatically based on species frequency filters set by regional reviewers, and flagged records are reviewed before they become publicly visible. ### When to use both If you're submitting complete lists, there's a reasonable case for submitting to both platforms. BirdTrack ensures your data reaches the BTO. eBird ensures your data contributes to global models and is available to the international research community. If you're going to choose one, the deciding factor is usually where your data does the most local good. For UK birders, BirdTrack's integration with county recording networks and the BTO's analytical pipeline gives it an edge for domestic conservation. For birders who travel internationally or want their records to contribute to global datasets, eBird's reach is unmatched. Neither platform replaces structured survey participation. A complete list on BirdTrack or eBird is valuable, but the survey protocols of WeBS or BBS control for variables (timing, method, spatial coverage) that ad hoc recording cannot. ## How survey data reaches conservation decisions The chain from your clipboard to a policy outcome is longer than most volunteers see, but it's concrete and traceable. ### Population trends and indicators BBS data is the primary source for the UK's breeding bird population trends. These trends feed into the Wild Bird Indicators published by Defra, which are one of the government's headline measures of biodiversity health. The farmland bird indicator, showing a long, grim decline since the 1970s, has been cited in parliamentary debates, used to evaluate agri-environment schemes, and referenced in the 25 Year Environment Plan. That indicator is built, fundamentally, from BBS transect walks done by volunteers on spring mornings. The mechanism is worth spelling out. The BBS trend for Corn Bunting, say, shows a statistically significant decline. The Corn Bunting doesn't know any of this, but the chain from the volunteer who recorded three singing males on a transect in Wiltshire to the policy analyst reading a Defra spreadsheet is unbroken. ### Site-level protection WeBS data is central to the identification and monitoring of internationally important sites for waterbirds. WeBS alerts — the system that flags significant changes in a species' numbers at a specific site — are one mechanism by which conservation agencies assess whether designated sites are in favourable condition. This is not hypothetical. The data that produces those alerts comes from volunteers standing on estuaries in January, counting waders. ### Atlas and distribution data The BTO's Bird Atlas projects — the most recent covering 2007–11 — use a combination of survey data and ad hoc records (including BirdTrack submissions) to map the breeding and wintering distribution of every species in Britain and Ireland. Atlas data reveals range expansions and contractions that trend data alone can miss: a species might be stable in numbers nationally but retreating from its range margins, or expanding into new areas. BirdTrack's contribution here is significant. The platform's year-round recording captures distribution data outside the BBS breeding season window, and its spatial resolution (records are tied to specific sites or grid references) allows fine-grained mapping that structured surveys, with their fixed squares and sections, cannot always provide. ### Migration timing and phenology BirdTrack data has been used in published research on migration timing, including analyses of how arrival and departure dates for migratory species have shifted in response to climate. These analyses require long runs of data from many sites, which is exactly what a platform with thousands of contributors recording year-round can provide. In mid-October the autumn passage is well under way. A single observer's records are a data point. Aggregated across thousands of observers and across years, those records become a signal — the kind of evidence base that lets researchers track how migration timing is shifting. ## Getting started ### Equipment Nothing beyond what you already carry. If you're joining WeBS, you may find a scope useful for counting distant flocks on open water. For BBS, ear is as important as eye — many records are of birds heard rather than seen. The recording medium matters less than the habit. Some counters use paper tally sheets and transcribe later; others record directly into the BirdTrack or eBird app in the field. A pencil and a Rite in the Rain notebook have yet to run out of battery. ### Time commitment | Scheme | Visits per year | Time per visit | Season | |---|---|---|---| | WeBS (core) | Up to 7 | Variable by section | Non-breeding | | BBS | 2 | Variable | Breeding season | | GBW | Weekly | Brief | All year | | BirdTrack (complete lists) | Variable | Variable | All year | The value of the data depends on consistency across years, so adopting a site or square is a commitment worth taking seriously. ### Common mistakes **Recording only the interesting birds.** If you're submitting a complete list, it needs to be complete. An incomplete list submitted as complete introduces bias that's difficult to correct analytically. Estimating large flocks carelessly is a related problem. Counting is a skill. Common practice is to count a block of ten or twenty-five, then use that block as a unit to estimate the whole. It's imprecise, but a careful estimate is far more useful than a round number plucked from the air. "About 2,000" recorded honestly is better than "2,000" recorded confidently but meaning "a lot." Submitting without checking the date can distort phenological analyses. A record entered under the wrong date is surprisingly hard to catch after the fact. Long-standing practice is to double-check if you're transcribing from a notebook. **Covering someone else's WeBS section without telling the organiser.** WeBS sections are allocated to avoid double-counting. Conventional wisdom holds that coordination with your local WeBS organiser is essential, and their contact details are available through the BTO. Assuming your records are too ordinary to matter is perhaps the most common hesitation. The species driving conservation concern are not all rare. A BBS square in suburban Birmingham produces data every bit as important as one on the Cairngorm plateau. More so, arguably, because the pressures on common birds in human-dominated landscapes are where most of the conservation action is needed. ## What your records join That figure represents an extraordinary collective effort — decades of early mornings, cold hands, and meticulous tallying by thousands of people who found it worth doing. Patch counts, submitted consistently and completely, become part of a dataset that outlasts any individual observer. That's the quiet promise of structured recording: the work accumulates, and its value compounds. None of which is a reason to start. The reason to start is that it makes the birding better. Keeping a complete list sharpens attention. Counting forces you to look at the flock rather than past it. Walking a transect on a fixed route twice a year teaches you what's changed and what hasn't, which is a different kind of knowledge from chasing the next new bird. The data going somewhere useful is a consequence, not a motive, but it's a consequence worth understanding, because it turns a private habit into something that works. --- ## Sources References drawn on for this article. - [The Wetland Bird Survey (WeBS)](https://nbn.org.uk/biological-recording-scheme/the-wetland-bird-survey-webs) - [Participate in a range of local and national surveys](https://www.ntbc.org.uk?page_id=90) - [BTO/JNCC/RSPB Wetland Bird Survey](https://volunteer.rspb.org.uk/opportunities/115225-bto-jncc-rspb-wetland-bird-survey-2026-05-11) - [WETLAND BIRD SURVEY](https://www.bto.org/sites/default/files/webs_methods.pdf) - [BirdTrack](https://en.wikipedia.org/wiki/BirdTrack) - [Bird atlas](https://en.wikipedia.org/wiki/Bird_atlas) - [Counting](https://en.wikipedia.org/wiki/Counting)