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1 #BOUsci21 #Sesh1 // If you’ve read somewhere that UK bird species are increasing or decreasing, chances are that information has come from the UK Breeding Bird Survey. @BBS_birds is run by BTO in partnership with JNCC and RSPB. #BTOscience Image
2 #BOUsci21 #Sesh1 // Since 1994, a loyal team of skilled volunteers has surveyed a stratified random sample that has grown to >4000 1-km squares. Twice each spring, they count birds along transects and assign them to distance bands to assess detectability #BTOscience
3 #BOUsci21 #Sesh1 // From these data we produce population trends for around 50% of UK breeding bird species. These account for over 95% of all individual birds in the UK, so BBS tells us a lot about our bird populations: bto.org/bbs-results #BTOscience Image
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