In Finland, ringing of birds was initiated 100 years ago. Since then, almost 10.4 million birds have been ringed with more than 1.1 million subsequent encounters. These data, hosted by the Finnish Ringing...
In Finland, ringing of birds was initiated 100 years ago. Since then, almost 10.4 million birds have been ringed with more than 1.1 million subsequent encounters. These data, hosted by the Finnish Ringing...
