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Page 140
To the tions of bird migrations should be right and left of the road , huge carried out in various areas of Eu- nets ... a Danish schoolteacher , G. Marten- autumn whole flocks of birds are sen , who suggested that individual trapped in ...
To the tions of bird migrations should be right and left of the road , huge carried out in various areas of Eu- nets ... a Danish schoolteacher , G. Marten- autumn whole flocks of birds are sen , who suggested that individual trapped in ...
Page 141
same are the characteristic beating of wings a bird often gets so tangled up in of a flock of wild geese ... loons , swift justify themselves fully : 50,000 and slim like jet planes , zoom past ; birds are ringed there annually , ducks ...
same are the characteristic beating of wings a bird often gets so tangled up in of a flock of wild geese ... loons , swift justify themselves fully : 50,000 and slim like jet planes , zoom past ; birds are ringed there annually , ducks ...
Page 142
Ringing has considergreat number of birds must be ably revised previous estimates . ringed . In 1959 , 250,000 birds Starling No. 326574 was ringed on were marked in the USSR , though the Kurshskaya spit and 24 hours the usual figure ...
Ringing has considergreat number of birds must be ably revised previous estimates . ringed . In 1959 , 250,000 birds Starling No. 326574 was ringed on were marked in the USSR , though the Kurshskaya spit and 24 hours the usual figure ...
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