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Q&A Butterfly Migration over Lassen Peak

Roughly 10 years ago I hiked up Lassen Peak in Northern California, and there was a huge (hundreds of thousands) butterfly migration going right over the top of the peak around this time of year. I...

1 answer  ·  posted 8y ago by Erik‭  ·  last activity 6y ago by System‭

Question animals animal-behaviour hiking migration butterflies