A plastic board repaired to the pole was lit up in 10-minute periods rotating with darkness. The LED lights illuminating the board switched over between white or red LED light. By using ultrasonic microphones, the researchers taped the echolocation phone calls of bats coming close in order to recognize both the types as well as the number of bats going by the dark or lit speculative website. Various other societies additionally see bats in a human residence as a good omen. Merlin Tuttle relates that in his study in the north and western component of Kenya, the Nandi and also Lugen peoples welcome bats right into their residences as bringers of all the best.