Translations:Adventist Youth Honors Answer Book/Nature/Birds - Advanced/46/en

Many birders take part in censuses of bird populations and migratory patterns which are sometimes specific to individual species. These birders may also count all birds in a given area, as in the Christmas Bird Count. This citizen science can assist in identifying environmental threats to the well-being of birds or, conversely, in assessing outcomes of environmental management initiatives intended to ensure the survival of at-risk species or encourage the breeding of species for aesthetic or ecological reasons. This more scientific side of the hobby is an aspect of ornithology, coordinated in the UK by the British Trust for Ornithology.