ponada has a more welcoming refugee policy. this syrian family you re seeing now crossed on saturday through the woods into quebec. the canadian border agency says there were 369 such refugees from the united states in november, and in december there were 591. president trump said recently that no one knows whether climate change is real, but he s keeping an open mind. well, mark phillips has something to consider from the bottom of the world. he s in antarctica for our climate diaries. reporter: high summer in antarctica. an explosion of life when the deep freezer warms up to become just the refrigerator, and an explosion of scientific research when the antarctic reveals the secrets that have been locked in its ice. there s something going on.
growing threat below. hundreds are illegally shot out of the sky each year, and the land they breed in is being built on. hi, sacha. hello. reporter: we spoke with sacha via skype during the first leg of her expedition in the russian tundra. did it ever occur to you to carry out this research on foot or just in a car? it s not possible. the only people up there are reindeer breeders who use sleds and reindeer. reporter: and it s those reindeer breeders, along with fishermen and farmers, she s come all this way to meet, to speak with, and to share the story of the swan s declines. they want to know, so i m able to tell them all of the data why we know the swans are decleaning, how much research we ve done and they re really interested in that. reporter: they re also interested in the unusual sight. sacha flies just as fast as her feathered subjects but at 35 miles an hour she s got three more months to go, a long flight
powerful story. well, when we return, we ll take flight with the swans of northern europe. why are fewer of these birds making their annual migration from the arctic?
ninan: and we close tonight in the skies over the arctic where a dwindling number of swans are making their annual mitbraigz to northern europe. jonathan vigliotti tells us about a british conservationist who is taking flight to save the birds. reporter: europe s majestic bewick swans have an unlikely new copilot. 41-year-old sacha dench, with the help of a motorized paraglider, is joining their seasonal migration south. it s a 4,000-mile journey that begins in the remote feeding grounds in russia s arctic north, and ends all the way in england. her mechanical wings are part of a bold effort to asset endangered species from the
plan she hopes can solve the plight of the swans. this is a conservation problem we re causing and we can fix it. and i think if you share the right information with the right people that ask the right questions, then we have a really good chance of solving it. reporter: it s a manmade problem one woman is taking to the skies to end. jonathan vigliotti, cbs news, london. ninan: and sacha is videotaping the entire journey to share it with everyone else. and soos the cbs weekend news for this saturday. later on cbs, 48 hours. the news continues now on our 24-hour digital network cbsn at cbsnews.com. and don t forget, be sure to tune in tomorrow morning as jane pauley debuts as the anchor of sunday morning here on cbs. i m reena ninan in new york. thank you for joining us. good night. captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org