RSPB organises bird record data collection in annual collective birdwatching days in Britain. RSPB claims this is the "world's biggest wildlife survey" and helps that society to get a better knowledge on bird population trends in Britain. That activity was launched in 1979 as an activity for kids, although from 2001 is a survey open to adults too. In 2011 over 600,000 people took part, being only 37% RSPB's members. The usual date for this birdwatching collective activity is the January's last weekend. From the start of this annual survey records for sparrows show a decline of 60%, while starling population's decline is about 80% from 1979 to 2012.

বাৰ্ডট্ৰেক
সংৰক্ষিত বনাঞ্চল
সহযোগী সংগঠন
বিগ গাৰ্ডেন পক্ষী নিৰীক্ষণ