Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
4.5
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
1254
Points per Word
0.000399
Description
Nearly two-thirds of Earth's surface is covered in water, so many birds are waterbirds. Read about their long legs for wading, webbed feet for swimming and their various differences.