ITIGUCTD72 1 !! 讓
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Tthese _失 migratory birds travel
mely long flights, 了hey Stay im 了he Sky 和
ery eat. On theSe exttt
s 所atitne. One SW1ss study in 2013 showed that Alpine SW1fts 和main 思 也ea
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an We imagined. Specla
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over up to 10,000 km and g
that Alpine SWitts dont sleep at 和
e of getting at least Some Shut-
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SWiWtS coultdc
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agree that they are cabatbl
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tnany eye up mm thes
tnakes thet
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18
