(c)
DIRECTIVE 2009/147/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 November 2009 on the conservation of wild birds (codified version) · European Union
Listing of data on the population levels of migratory species as shown by ringing.
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Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as consolidated on 2019-06-26; changes after this date are not shown.