The measures to be taken must apply to the various factors which may affect the numbers of birds, namely the repercussions of man’s activities and in particular the destruction and pollution of their habitats, capture and killing by man and the trade resulting from such practices; the stringency of such measures should be adapted to the particular situation of the various species within the framework of a conservation policy.
Võetavaid meetmeid tuleb kohaldada lindude arvukust mõjutavate mitmesuguste tegurite suhtes, nagu inimtegevuse tagajärjed, eelkõige lindude elupaikade hävitamine ja saastamine, lindude püüdmine ja tapmine inimese poolt ning sellega kaasnev kaubandus. Looduskaitsepoliitika raames tuleb selliste meetmete rangust kohandada vastavalt eri liikide konkreetsele olukorrale.