How Beavers Build Dams | Leave it to Beavers | PBS


Beavers are vegetarians. They gnaw through bark to eat the sugary layer underneath. They’ve been gnawing through forests for 20 million years. Felling trees with your teeth takes great strength, skill and patience. One technique is to slice halfway through and let the wind do the rest. The Beavers incisors are strengthened with iron, which makes them orange. They grow continuously and even self-sharpen. The pond makes it easier to move around the heavy logs. They need to build their dams. Out of the water, it’s a struggle. Stones help weigh down the base. The whole family works together, carefully interlocking the timber. They dredge mud from the pond bottom to seal the dam. Each pond traps several inches of sediment every year so there’s plenty of it. the young act as apprentice builders, learning the tricks of the trade. The final results are impressive. In the Rocky Mountains beaver dams slowly filter billions of tons of water. The ponds build up soil and nutrients and help prevent floods and droughts.

69 thoughts on “How Beavers Build Dams | Leave it to Beavers | PBS

  1. Environmentalist: We need to plant trees to control global warming.
    Humans:yeah we will
    Beavers:hold my teeth?

  2. Hmmmm sooo much cementing paste and rare flowers.

    You know, its ARK™ gamers

  3. Did any scientists ever find beavers buried by trees they or their neighbourss gnawed?

  4. i accidentaly opened this video….but u noe what ..i loved it…tnku fr making this one…i m civil engineer and i am staggered that something like this happens…wow!! nature is so simple yet beautiful and amazing….

  5. I saw beavers years ago on a hike in the mountains around Taos, New Mexico. Only saw them swimming not working but thought they were pretty cool. Little did I know how cool they really are until I watched this. They are now my favorite animal. 🙂

  6. الله أكبر سبحان الله العظيم
    حتى الحيوان يعمل بصدق وإخلاص بعدما علمه الله رب العالمين
    إلا الإنسان وخصوصا العرب والمسلمين وبالطبع ليس الكل
    الكثير من الناس يقتلون ويغتصبون ويكذبون ويزنون حتى في محارمهم والمثلية وايذاء الجار وظلم الضعفاء والمساكين واكل حقوقهم وفساد وتشريد العباد
    وتزييف الشرع بأسم سنة رسولهم
    الحيوان أثبت نفسه أنه أكرم من الإنسان يعمل بما علمه الله والإنسان يفسد ماعلمه الله
    الله الله الله اكبر والف لاحول ولا قوة الا بالله العلي العظيم ياريت الناس تتعلم من الحيوان

  7. سبحان الله سبحان الخالق ☝️☝️☝️☝️☝️☝️☝️☝️☝️

  8. Hey bro.. Wat is the secret of your strong teeth. Colgate or pepsodent toothpaste

  9. 喔,連河瀨长得也像熊,鸽子的心,像树干,万物群咬,像脱肛一样,而脱肛只是多了屁眼辣疼,但,,,心都一样,,,。

  10. سبحان الله لا حول ولا قوه الا بالله

  11. ấy vui công nhận hàm răng cứng rớm nhỉ
    cạp cây như thế mà không ê răng nhỉ.
    thiệt bái phục luông đấy.

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