Rosa and Alec are identifying the trees where they live. To do this, they look at the leaves, the bark and the structure of the trees.
By identifying many trees in one area, they learn about forest diversity. Different kinds of trees host different birds, bugs and other critters.
To learn more about identifying trees in the Northeast USA, see:
Identify a tree's by common name using this leaf key
A simple tree leaf identification key for finding 100 of the most common North American tree's common name and species name.
Check out this Google search: tree identification leaf forestry
To find out more about tree identification in other parts of America, see:
Tree Identification at arborday.org
To learn about trees in the rainforest, see:
The Rainforest Alliance
To learn about trees in the desert, see:
Spectacular Desert Plant Life by Ecoist
Whether you live in Botswana or Bahrain, Ecuador or Spain, or anywhere else in the world, there are interesting trees to identify and learn about!