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Discussion (24 Comments)Read Original on HackerNews
I wonder why that is? There are no topological features defining these borders. Maybe the data is normalised in some way across countries?
Most of the German/British tourists seem to come during the summer though, in contrast to the tourist birds who come during winter. Smart of the birds to avoid all the tourists!
That never made any sense to me. I also go rather go with the birds north in summer where it is cool and to spain in winter when it is still warm.
Some birds migrate outside Europe.