"One of the really cool features of hummingbird evolution is that they all eat the same thing yet have diversified dramatically," McGuire says.Speed Dating Hong Kong

"It really is a big surprise that hummingbirds have divided the nectarivore niche so extensively."mess up my intentions

The new, time-calibrated evolutionary tree shows that ancestral hummingbirds split from the swifts and treeswifts about 42 million years ago, probably in Eurasia.cherish baby lovely blush

By about 22 million years ago, the ancestral species of all modern hummingbirds had made its way to South America, and that's when things really took off.hold back these tears I cry

The Andes Mountains are a particular hotspot for hummingbird evolution, because diversification occurred along with the uplift of those peaks over the past 10 million years.star shine in black hole

About 140 hummingbird species live in the Andes today.五道涙