Online timer for 86 minutes
Back at the same estuary for a second run, you can restart the 86 minutes and resume watching the waterline rather than treating the new count as an extension of the first. Keep the same route, observation points and direction if conditions allow. Note the fresh start time on your field sheet, then record birds seen during this run separately, including waders moving across exposed flats and shags passing over the channel.
Along the mudflat, consecutive timed surveys are easier to compare when each one has a clear boundary. Finish any note from the first run before recording the next sighting, and mark birds that may have shifted between nearby roosts. The tide, wind and human activity can change while one interval follows another, so a short note about conditions helps explain why the second tally differs without merging both sets of observations.
When the second circuit reaches a viewpoint earlier than expected, use the spare portion to watch one defined patch instead of adding a new stretch of shoreline. If the circuit takes longer because rising water concentrates birds or soft ground slows your pace, stop the timed record at the signal and label later sightings separately. That preserves a comparable repeat while still allowing useful observations after the measured period has ended.
Common questions
How can an incoming tide change a second estuary bird count during this interval?
Birds may leave feeding flats and gather on higher shellbanks or grass edges as water rises. Keep the route consistent, but note the tide stage so the changed distribution is clear in the second record.
What if the estuary circuit finishes before or after the timed repeat ends?
If it finishes early, watch a fixed area until the signal rather than extending the route. If it finishes late, separate sightings made after the signal from the timed count.
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