Method
There are slightly different methods for each species, but in general they consist of participants visually counting the birds from a distance. They surveys can last from 20 minutes to whole-day visits. The first count is to get overall abundances and a second follow-up survey count can be done to count juveniles to calculate breeding success. The survey methodologies are standardised and documented in the handbook used by volunteers.
Participants need their own equipment, which generally consists of binoculars, a tally counter, a telescope and tripod, and in some cases boat hire. There are two recording forms provided to volunteers depending on whether they are conducting a colony count, or assessing breeding success. These can be found on the website here: Taking Part | BTO.
Feedback is collected through an online form and through ongoing communication during events to help inform future work.