asked 4.7k views
5 votes
What happened to the greenish warbler birds as they migrated from the southern portion of their range up around the Tibetan Plateau?

asked
User Nelhage
by
7.7k points

1 Answer

2 votes
They evolved separately as they moved north and became two separate species.
answered
User Karim Mtl
by
8.2k points
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