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The Impact of the Broad-tailed Hummingbirds' Migration

Season 1 Episode 4 | 7m 35s

billy barr looks through the logs he's been keeping for almost 50 years. He explains how the glacier lilies emergence is becoming more and more out of sync with the broad-tailed hummingbirds arrival after their long migration up from Mexico. When billy started keeping his records in the 70s they arrived on the same day, today the lily is flowering three weeks before the hummingbird arrives.

Extras
A momentous occasion as a new Buffalo herd are returned to the Fort Peck Reservation.
Plants are reacting to our changing climate so scientists are looking to soil for answers.
Wildebeest numbers rose after eradicating rinderpest. The Serengeti ecosystem rebounded.
Forgotten and overlooked, grasslands could hold the key to our planet’s survival.
Red foxes are moving further north following the encroachment of the tree line.
Reindeer are playing a crucial role in preserving the tundra by eating forest vegetation.
At the planet’s frozen extremes, animals can reveal the changes taking place.
The ibex are Israel’s newest big city resident with rising desert temperatures.
Mylene finds that when temperatures rise, zebra finches can sing to their unhatched eggs.
In the Gobi Desert, Adiya Yadamsuren tracks a wild camel to a water hole.
Forgotten and overlooked, grasslands could hold the key to our planet’s survival.
Ice
At the planet’s frozen extremes, animals can reveal the changes taking place.
In the hottest places, species are going to extraordinary lengths to survive.
Remarkable island wildlife reveals insights into our rapidly changing planet.
Animals have a surprising story to tell about our rapidly changing planet.