Tribe has been collaring elk and tracking herds since 2008 to get an idea of population sizes and migration patterns ...

According to experts these illegal migrations occur due to changes in global migration patterns, downfall of various economies, instability in the third-world and a change of perception by immigrants.

Every winter, a marvelous spectacle occurs as hundreds of thousands of butterflies travel south across Taiwan in one of the world’s most rare migrations.

Employment and Social Trends report highlights shifting patterns of employment and social development worldwide, including distinctive trends emerging in the Caribbean and Latin America.

This winter’s annual Western Monarch Count was the third lowest on record. Scientists say habitat loss, climate change and ...