migration

Border wall could harm endangered animals

February 2, 2017

Biologists are worried that a border wall would cut off dozens of species that migrate between Mexico and the United States. Penn State University biologist Jesse ...

Cuckoos reveal mystery migration route

November 23, 2016

Three common cuckoos (Cuculus canorus) recently made an extraordinary journey across three continents, revealing the species’ previously unknown winter migration ...
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