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James E. Miller <br />Program Leader, Fish and Wildlife <br />USD^- Extension Service <br />Natural Resources and Rural <br /> Development Unit <br />Washington, D.C. 20250 <br /> <br />Figure 1. Beaver. Castor canadensis <br /> <br />BEAVERS <br /> <br />Damage Prevention and <br />Control Methods <br />Exclusion <br /> <br />Fence small critical areas such as <br />culverts, drains, small ponds or <br />lakes, and barriers around impor- <br />tant trees in urban settings <br /> <br />Cultural Methods and Habitat <br />Modification <br /> <br />Eliminate foods, trees and woody <br />vesetation where feasible; Continu- <br /> <br />used to build dams; use a three-log <br />drain or other structural device to <br />maintain a lower pond level and <br />avoid further pond expansion <br /> <br />Frightening <br /> <br />Can occasionally work by shooting <br />or dynamiting or other continued <br />destruction of lodges, bank dens <br />and dams <br /> <br />Repellents <br /> <br />None registered, however there is <br />some evidence that repellents may <br />be useful. More research is needed. <br /> <br />Toxicants <br /> <br />None registered <br /> <br />FUm[ganf~=' ' <br /> <br />None registered <br /> <br />Traps <br /> <br />Conibear® type, size 330 are very <br />effective, mobile, practical and <br />humane, with no escapes. The <br /> <br />leghold types size No. 3 or'larger <br />(include coil-spring types with~ <br />equivalent jaw spread and impact) <br />are also effective when properly <br />used. Basket/suitcase type traps are <br />primarily used for live trapping. <br />Where legal, snares can be useful <br />particularly in dive sets and slides. <br /> <br />Shooting <br /> <br />Rarely effective for complete con- <br />trol efforts and can be dangerous <br />to humans <br /> <br />Othee.~:M~tho~ ....... <br /> <br />Other methods rarely solve a <br />beaver damage problem and may <br />cause more damage to nontarget <br />species than to beaver <br /> <br /> <br />