It All Started With a Few Trout. Now Yellowstone’s Iconic Birds Face ‘Collapse.'

An invasive fish set off a biological domino effect that has already affected bears and elk. Now it threatens trumpeter swans and other birds.

https://www.nationalgeographic.com/environment/2018/07/yellowstone-lake-trout-trumpeter-swan-avian-collapse-animals/

הועלה ב-יולי 3, 2018 08:47 לפנה"צ על ידי biohexx1