Certain factors such as the human scent that is left from the act of installing and maintaining the fladry may have contributed to the effectiveness of the fladry in these trials. Scientists have observed that fladry may keep wolves from crossing fencelines for approximately 75 days. The overall body of scientific literature seems to demonstrate that fladry can be effective at keeping wolves from crossing fencelines for a finite period of time but may not be useful in the long run. The theory behind fladry is that it would create some kind of “visual barrier” wolves feel apprehensive about crossing, thus creating a neophobic response. Fladry has historically been used for hunting wolves in Europe and Russia. Fladryįladry is a nonlethal management tool that uses flags that hang down from a rope hung along a fenceline. Therefore, it is important that nonlethal options are explored and the data regarding their effectiveness is considered so that these tools can be properly utilized to create the best possible result. Not only do wolves kill livestock, but the stress that is instilled in livestock by wolves leads to economically significant losses in weight gain and reproduction rates.
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