Seasonal change is all around us. Children see it in the length of a day, in the appearance of a flower, in the flight of a butterfly. Journey North is a free, Internet-based program that explores the interrelated aspects of seasonal change. Citizen scientists across North America share their own observations of migrations and other signs of the seasons.

Contributed by Hummingbird Expert Lanny Chambers

• threats/human impacts 
• habitat loss 
• conservation status 
• historic
  population size 
• conservation efforts

Contributed by Hummingbird Expert Lanny Chambers

• habitat and range 

• niche 

• food 

• enemies 

• adaptations 

• migration 

• populations 

• distribution 

• ecosystems