Migratory birds
In this Agreement, the term "migratory birds" means species (hereinafter including subspecies) of wild birds for which reliable information is available regarding their natural migrations between territories of the states of both Parties. Bird species introduced onto the territory of a State Party by another Party, even if they are migratory, are not subject to the provisions of this Agreement.
Source: Agreement between the Government of the Russian Federation and the Government of the People's Republic of China on the protection of migratory birds and their habitats