1、How about beavers—ecosystems with beavers in waterways.

2、Dams are built by beavers.

3、“air force kills beavers to save beavers, ” says one headline. “murdered beavers speak of air force cruelty, ” says another.

4、And they set traps to catch wild beavers and weasels.

5、As an example, let's look at foraging behavior among beavers.

6、I concede the innocence and creativity of beavers.

7、Or the bobcat, needing rabbits and beavers and den sites.

8、The beavers build their home by using sticks and mud.

9、There used to be beavers all over the place, something like 200 million beavers, just in the continental United States.

10、If the Department of natural resources and Environmental Protection lives up to its name, it should protect the natural resources (beavers) and the environment (beavers' DAMS.).

11、The soft, fine undercoat of certain mammals, such as otters, beavers, and seals.

12、But, they will also catch smaller prey including rabbits, beavers, fish, and smaller rodents.

13、The beavers carry or drag the logs into the water and float them into place.

14、The den of certain animals, such as the dome - shaped structure built by beavers.

15、"It's an old hiding-place for beavers in bad times," said Mr Beaver, "and a great secret."

16、But gradually the wood in them decays and the beavers add more and more mud to repair them.

17、People are generally eager beavers when they are new to a job and want to impress their bosses.

18、My first dam question to you is: (1) Are you trying to discriminate against my Spring Pond beavers or (2) do you require all beavers throughout this State to conform to said dam request?

19、There's an etymological connection between the platform upon which speeches are made and squirrels, rats and beavers.

20、The coyotes killed a large percentage of the park's red foxes, and completely drove away the park's beavers.

21、If water levels fall in summer, as they do in most of North America, then beavers lodge entrances may be exposed.

22、Yet it is vital to the survival of humans and a wide range of critters from dragonflies and piranhas to beavers and bullfrogs.

23、Manhattan supported an extraordinary level of biodiversity. The ecosystem included more than 85 different kinds of fish, as well as beavers and black bears.

24、The beavers were hunted a lot, overhunted, they are almost extinct by the 1800s, that meant fewer wetlands, less standing water.

25、In the same way beavers construct DAMS, red grouper excavate and maintain distinct holes whose rocky surfaces provide a place for coral, sponges and other Marine life to congregate.

26、It's been shaped by constraints over vast stretches of time, all of which comes down to the fact that the best foraging strategy for beavers isn't the one that yields the most food or wood.

27、As Cheney beavers away on his memoirs above the garage at his new house in the Washington suburbs, some of his associates have pointed out the irony of what he is doing.

28、These beavers do know how to build dams, and do so if the need arises, as may occur if they are forced to relocate after felling and consuming all nearby trees.