Fact 1: Migrants typically travel long distances.

Fact 2: Birds such as sparrows and warblers are nocturnal migrants and travel at night.

Given the two facts above, answer the question "What are nocturnal and travel long distances at night?" with the following options: 
- warm-blooded
 - mammals
 - bears
 - travelers
 - warblers
 - insects
 - bees
 - animals


 

     warblers    