Survey
Methods
PatchBird Surveys are designed to create a repeatable network of bird observations that can reveal ecological patterns through time. While many bird monitoring initiatives operate at national or regional scales, PatchBird focuses on standardised observations from fixed locations within local landscapes.
By returning to the same observation point and following a consistent survey protocol, observers contribute data that can reveal seasonal changes, local population dynamics and longer-term ecological trends.
The method is intentionally simple, allowing broad participation while maintaining the consistency needed for meaningful comparisons over time.
The Spatial Concept
Each PatchBird survey area is anchored by a fixed reference point within the 1 × 1 km UTM grid.
A 300-metre radius around this reference point defines the area within which the observer may establish the actual survey location. The reference point provides a consistent spatial framework for the PatchBird network, while the 400-metre radius gives observers enough flexibility to select a suitable place for field observations.
The observation point may therefore differ from the grid reference point. It should be chosen with repeated monitoring in mind, taking into account safety, accessibility and practical field conditions.
Establishing the Observation Location
Before conducting the first survey, the observer should select a suitable observation point within 300 metres of the grid reference point.
The location should allow the observer to remain stationary for the full survey while providing reasonable listening and viewing conditions across the surrounding landscape.
When selecting the observation point, consider:
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safety and accessibility
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long-term usability
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disturbance from traffic or machinery
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seasonal accessibility
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private property and access restrictions
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the ability to recognise and return to the exact location
Once selected, this becomes the permanent observation point for that PatchBird survey location. Future surveys should be conducted from the very same point.
Habitat Context
The ecological context of the observation point should be documented when the survey location is first established.
The habitat description must refer to the actual observation location, not the reference centre of the survey circle.
Examples of common habitat categories include:
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farmland
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grassland
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woodland
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wetland
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scrub
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urban and industrial
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coastal habitat
Documenting the habitat of the observation point helps capture the ecological conditions under which the survey takes place.
The Survey Method
PatchBird Surveys use a simple, standardised method designed for repeated bird monitoring at fixed locations. Each survey consists of a 15-minute stationary count during which all birds detected by sight or sound are recorded.
The value of the method comes from consistency. Surveys conducted from the same location, using the same duration and recording principles, can be compared through seasons and across years as the dataset grows.
1. The Spatial Framework
PatchBird survey locations are organised using a 1 × 1 km UTM grid. Each location is anchored by a fixed grid reference point, which provides the spatial framework for the survey network.
The grid reference point does not have to be the exact location from which the survey is conducted. Observers may select a suitable observation point within 300 metres of the reference point.
This flexibility allows the survey location to account for access, safety and local field conditions while remaining associated with the same PatchBird grid point.
2. Selecting the Observation Point
Before conducting the first survey, choose a suitable observation point within the 300-metre radius.
The location should allow you to remain stationary for 15 minutes and provide reasonable opportunities to detect birds by sight and sound. When choosing the point, consider:
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safety and accessibility
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whether the location is likely to remain accessible in different seasons
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disturbance from traffic, machinery or other sources
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private property and access restrictions
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whether you can reliably find the exact location again
Once the first survey has been completed, the observation point becomes fixed. Subsequent surveys should be conducted from the same location.
Record or save the exact coordinates of your observation point so that you can return to it accurately.
3. Habitat Context
The observation point does not need to represent a single habitat type. Many PatchBird locations include a mixture of habitats such as woodland, farmland, grassland, wetlands, settlements or transitional areas.
This is intentional. PatchBird monitors the bird community detectable from a fixed point within the landscape rather than attempting to isolate individual habitat types.
When selecting a new observation point, avoid choosing a location solely because it is particularly rich in birds. The aim is to establish a practical and repeatable monitoring location, not necessarily the place with the highest bird activity.
4. Conducting the Survey
Each PatchBird Survey is a 15-minute stationary count.
Remain at the fixed observation point for the full 15 minutes and record all birds detected by sight or sound.
Record:
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every bird species detected
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the number of individuals of each species
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birds flying over the survey area as well as those using the surrounding habitat
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zero counts where appropriate by submitting a complete checklist even when few or no birds are detected
Do not move around significantly to search for additional birds during the survey. Birds detected from the observation point may be recorded regardless of their distance from you, provided you can identify them with reasonable confidence.
The objective is not to find as many species as possible, but to document what is detectable from that location during the standardised 15-minute period.
5. Timing
Whenever possible, surveys should be conducted within four hours after sunrise, when many bird species are most active and detectable. This is the preferred survey period, but it is not a requirement.
Surveys conducted later in the day or in the evening are also valid and should be submitted. Practical circumstances, access and seasonal conditions may make morning surveys difficult or impossible.
For repeated surveys at the same location, conducting visits at broadly similar times of day is useful where practical, but maintaining regular coverage is more important than restricting surveys to a narrow time window.
The time of each survey is recorded with the checklist, allowing differences in survey timing to be considered during later analysis.
6. Repeating Surveys
Repeated visits are fundamental to PatchBird Surveys.
Aim to revisit each survey location approximately every 10–14 days. Regular sampling across seasons is more valuable than concentrating many surveys into a short period.
Occasional longer gaps do not invalidate a survey location. Weather, access, travel and other practical circumstances will inevitably affect survey frequency. The objective is consistent long-term coverage rather than perfect adherence to a calendar.
Continue using the same observation point on every visit.
7. Recording and Submitting the Survey
PatchBird Surveys are submitted as complete eBird checklists.
For each survey:
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create a stationary checklist at the observation point
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record the survey duration as 15 minutes
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record all bird species and numbers detected
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mark the checklist as complete
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share the checklist with the PatchBird eBird account
Use the same eBird location for subsequent surveys from that observation point whenever possible. This helps maintain a consistent record through time.
Additional notes about unusual conditions, disturbance, access changes or other circumstances that may have influenced the survey can be added to the checklist comments.
8. Weather and Survey Conditions
Avoid conducting surveys in conditions that substantially reduce the ability to detect birds, particularly:
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heavy rain
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strong winds
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dense fog or severely reduced visibility
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unusually high levels of temporary noise or disturbance
Light rain, moderate wind or other less-than-perfect conditions do not automatically prevent a survey. Use reasonable judgement based on whether birds can still be detected effectively.
Recording surveys under a realistic range of conditions is preferable to restricting monitoring only to exceptionally favourable days.
9. Observer Consistency
PatchBird does not require the same observer to conduct every survey at a location. However, using the same observer where possible reduces variation associated with differences in identification skills and detection ability.
If another observer takes over a survey location, the observation point and survey protocol should remain unchanged.
Changes of observer are therefore acceptable; changes to the method are not.
The Key Principle
Same place. Same method. Fifteen minutes. Repeated through time.
PatchBird does not depend on unusually high species counts or perfect field conditions. Its strength comes from many standardised observations collected repeatedly from fixed locations.
A quiet survey is just as important as a busy one. Changes in what is not detected can be as informative as changes in what is.
Checklist sharing
To ensure your data are included in the PatchBird Surveys dataset:
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Add the PatchBird project’s eBird username (PatchBirdSurveys) to your contacts in the eBird app or website.
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Add the project username as a friend in eBird; this prevents the account from appearing unfamiliar when you share checklists.
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Shared checklists will then be included in the project’s analytical dataset.
Detailed information on eBird’s checklist-sharing process is available from the official eBird support resources.
Data Analysis and Outputs
PatchBird Surveys create a structured dataset of repeated observations from fixed locations. As the dataset grows, these records can be analysed to examine patterns in bird occurrence, relative abundance, seasonal change and longer-term variation.
Potential analytical outputs include:
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spatial patterns in bird occurrence and relative abundance
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seasonal changes in species presence and activity
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changes in relative abundance through time
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comparisons between locations, habitats and geographic regions
The analytical approach will continue to develop as the volume, geographic coverage and time span of the dataset increase. Where appropriate, analyses can account for factors such as survey timing, observer effects, habitat and variation in detectability.
The aim is to turn repeated local observations into a dataset that can contribute to ecological research, long-term monitoring and conservation.
Quality Assurance
Reliable citizen science data depend on clear protocols, consistent survey effort and appropriate validation. PatchBird Surveys support data quality through several complementary measures:
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a fixed 15-minute stationary survey method
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repeated observations from the same established location
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a structured 1 × 1 km UTM spatial framework
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complete checklists, including surveys with few or no detections
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consistent recording and submission through eBird
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eBird’s existing review and validation systems for unusual observations
Standardisation cannot eliminate all sources of variation. Bird detectability can be influenced by weather, time of day, habitat, season, species behaviour and differences between observers. These factors should be considered when interpreting the data and, where appropriate, incorporated into future analyses.
As the dataset grows, additional quality-control procedures can be developed to identify inconsistencies, unusual records and potential sources of bias.