Show Habits of Beavers I IA A pair of beavers beaven select a site alte In Ina a valley which has haa only thin patches of topsoil left by erosion and where the forest re reflects the poor soil con The They erect a dam apply applying Ing an amazing number of engineering engl engi principles in its construction construe tion and create a pond usually of several acres They build a house houseIn In the pond and cut down do trees tree along the shore They feed on the bark of the trees cut up the trunks trunk a and limbs and use them as material to repair the dam If It there Is la danger danger danger dan dan- ger of the main dam breaking they build several retaining dams below it to I lessen the pressure |