A zebra foal and his father catch up with the herd on its way back to the rich green lands of the delta.
(01:43)The mayfly is born, lives through middle-age, and then dies. All in the same day.
(02:41)The Inside Story of the science behind Migrations.
(01:08)Witness the lifecycle of a monarch butterfly - from egg to pupa to adult.
(03:00)Monarch butterflies descend to the forest floor in order to mate and begin their migration north.
(02:13)The final leg of the Monarch's journey is studded by the threatening hungry mouths of praying mantises.
(02:26)Crew member talks about the plane they used to capture monarchs in flight.
(02:18)Producer Stephanie explains monarchs and milkweed as she looks for milkweed in a field.
(01:47)Cameramen chase down the monarchs flying around a field.
(01:00)Migration Ecologist tests the first test ever of an electronic tag on a monarch butterfly.
(02:57)Red crab larvae hatch and head for dry land, covering Christmas Island's shores in delicate little crablings.
(02:22)Crab males endure a harrowing journey towards sea -- facing yellow crazy ants and traffic along the way.
(02:33)