Vaux's Swift
A flock of 13 thousand Vaux's Swifts does a 5-thousand-kilometers migration down America's west coast. Every year those tiny birds do a stop-over in Portland, Oregon, where they all find a place to sleep inside a towering chimney stack. The city of Portland has taken the chimney out of use, realizing its importance for the swifts.
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Posted on
Feb 11, 2021
More by giulia martinelli View profile
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