Animal Engineers: Beaver Dams

Animal Engineers: Beaver Dams — page 1

Animal Engineers: Beaver Dams — page 2 — CHAPTER 1 BUSY BEAVER A sleek brown head pops out of the stream It belongs to an American beaver The large rodent swims to the shore Then he waddles to a willow tree Beavers can hold their breath underwater for as long as 15 minutes 5

Animal Engineers: Beaver Dams — page 3 — The beaver uses his incisors to chew on the tree Soon the tree crashes to the ground The beaver carries the heavy log through the water He’s building a dam The dam is made of rocks logs branches and mud These materials stop the flow of the FUN FACT Beavers have clear eyelids that serve as goggles They help beavers see underwater 6

Animal Engineers: Beaver Dams — page 4 — Beavers teeth contain iron which helps them chew through trees stream The beaver’s hard work will result in a large still pond 7

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