Abstract: The invention provides for a device for deterring birds from overhead cables such as power lines, which device includes a clamping means for clamping the device on the overhead cable, the clamping means including a first member having a hook portion for hooking over the power line and a second member biased towards the hook portion, wherein said biased member includes a biasing means, and at least one vane set rotatably attached to the clamping means wherein the first and second members are displaceable relative to each other between a first loaded position, wherein the biasing means is loaded, and a second clamped position, wherein the biasing means is at least partially unloaded thereby clamping the power line between the first member and the second member. The invention further provides for a method of deploying said clamping means onto an overhead cable.