Polar Bear Invasion in Manitoba, Canada

Global warming is driving the animals closer to civilization.
5:18 | 11/20/11

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Transcript for Polar Bear Invasion in Manitoba, Canada
Shrinking habitat for wildlife can sometimes cause animals to wander into areas where I live school imagine. You're out -- for polar bears that is what's happening in this city in Manitoba Canada where scientists say the global warming. He is driving some of those beautiful -- potentially dangerous animals right into town. It's magnificent. Captivating. -- somehow. Even magical. Even the season in the wild. What's amazing at Churchill Manitoba calls itself the polar bear capital of the world. It is here on this -- blast of icy tundra. That hundreds of polar bears come out of their summer long corporate and head to the shores of Hudson Bay. Waiting for the water to freeze over they could go out onto the ice the hunt seals. But -- -- -- from these warning signs in town sometimes a polar bear who come right into church. And I don't like the boat and yeah even -- small but -- -- products. So wayward bears who wander into town to get arrested captured and taken here to bear jail. After several days of incarceration they are taken out tranquilize and blindfolded in case they wake up too soon. And there airlifted away. We followed in another helicopter as this bear was carried about forty miles north of -- Out into the wilderness. -- -- -- about four or 500 pounds he was kept in the bear jail only for about a week or so. What's it about three hours this -- tranquilizer to Wear off and then hopefully he'll go wandering off in another direction in search of food. -- the bear began to wake up blinking at the snow has eaten broccoli watching us watching him. A ranger -- -- back with Green die this way he shows up in Churchill again they will -- that he's a repeat offender. What's happened is we've had successive years now over the sea ice in the bay as an office much earlier -- bears are coming ashore earlier and in Florida division in the coming in the -- getting into trouble. -- York is a polar bear expert. Bitter Arctic species conservation for the World Wildlife Fund. Which is leading research into the -- habits and habitats backed by -- two million dollar grant from Coca-Cola. Dorks as Earth's warming climate means it is taking longer for the ice on Hudson beta form. And it is following earlier. -- a shorter period when polar bears are out on the ice beating bolivars or -- threatened and there are threatened by habitat loss driven by climate change. Jeff would be our guide on our polar bear expedition. -- wonder what they call buggies and go out into polar bear country -- hopefully up close and personal. But programs on our trip to the -- -- we saw lots of polar bears Brigham about a six -- eight year old female bear. Right next to our -- in fact she is come on over to. Check us out. But very curious. -- change your mind. The bears we saw were on the move but in no particular hurry they're hungry because they haven't had anything to eat since coming off the ice last July. And once again this year the ice has been late warming. -- -- -- Getting them to their meal this year. We're late getting in to their -- this year and they were early getting off so that that. When -- without -- is growing at both ends. On our last day the weather turned bitterly cold -- below zero and with a fierce numbing wind. I'm going to let you know -- there -- no problem no problem this is don't really want it but cold enough for the -- to Begin performing on Hudson Bay. We watched as some of the polar -- seemed to test the ice and they -- dissents to that soon finally. They'll be able to hunt for food. Did the current rate of ice loss. -- there'll be no ice forming any longer Hudson Bay by the year 2080s there have be lost there is an effort going on now to create a kind of a permanent habitat in the northern latitudes where there for the some of the 20000 plus Arctic polar bears that exist. Would involve preserving this area in the upper latitudes and has called the last -- -- resist. A global warming longer -- Coca-Cola company they are putting up money to support this research and effort and matching up to. A million -- Us some confidence in the seventh test it's. Now when you look at climate change mean what is the trend line from your perspective and no matter what's causing it what Everett as we know that it's warming we know that there's less ice and that without ice is not just that polar bears the ocean -- -- more difficult time. Kidding getting back -- eating away atmospheric carbon -- air gets works as the ice to please we know that but now there's been studies by a couple different Canadian agencies and it's proven. Vicious cycle thank you. If you want to try to help voters you couldn't contribute by going to ABC news -- Good Morning America dot com. -- --

This transcript has been automatically generated and may not be 100% accurate.

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