Every
year, the hummingbirds we track make amazing round-trip journeys
from wintering grounds in Mexico and Central America all the
way to Canada and Alaska. They need a lot of fuel to get there.
On both ends, and all along the route, hummers face some tough
challenges. And most of these come from human activities!
![](https://s3.us-east-2.amazonaws.com/journeynorth.org/images/graphics/humm/Rufous_NectarOrange_Robertson.jpg)