How Do Beavers Build Dams?

Beavers are water animals whose diet is tree bark. They are excellent swimmers and wood cutters, and they use the trees they chew down not only for food, but also for building lodges and dams.

Beavers live together in groups. They cut down trees together – one beaver chews while the other rests, and then the second beaver chews while the first rests. The beaver family builds its dam with logs, branches, plants, and rocks plastered together with mud. Building up from the bottom, the beavers use poles to strengthen the dam. Then they add more twigs, brush, water plants, and mud. When finished, the top of the dam is above water.

Beavers constantly repair their dams and lodges, and the dams grow to be very large. They even dig canals from wooded areas to the water to transport logs that are too heavy to carry over land.

One beaver dam in Montana measured 2,140 feet long!

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12 Comments

  1. Elmo
    Posted 2008/09/23 at 3:07 pm | Permalink

    Yay! It was short and filled wit info. Thanks for helpin me on my paper!!!

  2. Anonymous
    Posted 2009/05/14 at 8:22 am | Permalink

    That is so amazing.
    Pretty genius if i have to say so myself (:
    Beavers are soo cool :D

  3. anonomyous
    Posted 2009/04/15 at 3:49 pm | Permalink

    thx sooooooooo much cuz i hav 2 write y & how beavers make love i mean dams and that helped soooooooooo much thx by

  4. mesowick
    Posted 2009/04/19 at 1:03 pm | Permalink

    marvin has a pet and it is a platypus

  5. Anonymous
    Posted 2009/11/02 at 7:51 pm | Permalink

    thanks

  6. Anonymous
    Posted 2009/11/03 at 7:25 pm | Permalink

    um i have a question, the poles are they like poles? or they make poles out of sticks or something?

  7. Anonymous
    Posted 2009/11/03 at 9:16 pm | Permalink

    i had to write a report on this and it helped lots ty : )

  8. Anonymous
    Posted 2009/12/04 at 9:38 am | Permalink

    i dont care loser

  9. matt
    Posted 2010/02/19 at 1:02 pm | Permalink

    Thx soooo much my lttle bro ask how bervers bulid their dams so thx soooooooo much =D

  10. matt/rilly a girl
    Posted 2010/02/19 at 1:03 pm | Permalink

    Im a girl not a guy

    • matt/rilly a girl
      Posted 2010/02/19 at 1:04 pm | Permalink

      forget =D

  11. nathan
    Posted 2010/02/23 at 8:06 am | Permalink

    2,150 feet thats amazing

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