Drones Scare Away Crows With Sounds (2) (page 2)
Developed jointly by power producer, venture firm
Based on the results, the drone was replaced with a more appropriate one, and the speaker output was increased. The drone body needed to be larger for stable flight carrying a speaker. The increase in the drone body was also effective for stopping crows from attacking the drone (Fig. 2).
Materials that generate reflecting lights were also attached to the drone body later to visually scare away crows among other measures.
Special skills are required in flying the drone. It is more effective when slow flight and hovering are combined than flying it at high speed while producing the sounds. The drone is flown differently for scaring away wild boars and deer.
Following introduction of the new crow repelling method established as introduced above, almost no crows approach the solar power plant operated by Japan Environment Techno now, and damage due to droppings has decreased significantly.
Farmers and livestock farmers near the plant were initially shocked by the scary sounds and their volume, but are cooperating now because they know they also can benefit from the anti-crow measures.
Based on the effect of scaring away crows, the interval of producing sounds from stationary speakers was increased from one minute to five minutes, and the frequency of producing sounds using a drone was reduced to twice per month. Even after the changes, similar effects are maintained.
Japan Environment Techno and ECO-5 also plan to promote the sale of the devices needed to repel crows and the knowhow.