The sound of millions of Monarch Butterflies. Lets just hope millions of tourist come to hear this and wreck everything.
This is an important video. However, hopes are that at some future time, it will NOT be a video of things of the past - like the mourning dove - a species that has gone extinct! Many will say - "It can't happen!" However, at one time, they said that about the mourning dove. AND then "it happened!" [nytimes.com]
Thanks for posting it.
Amazing display and sound of the butterfly event.