Searching for a Short Story

I read a short story about a couple of scientists on an alien world who do not migrate to the mountains when the natives tell them to migrate because a great animal migration is coming.  the native leave and the scientists stay in their durable prefab home because they think that the little animals that the natives say will come in deadly mass are nothing to worry about.  Not to spoil the story, they stay and survive just barely.<br /><br />I want to read this story again but I've forgotten the name.  I believe I read it here on Project Gutenburg: https://www.gutenberg.org/wiki/Science_Fiction_(Bookshelf)<br /><br />Does anyone know this story?