hive-defender Honey beehive defender from large predators such as Asian Hornets Notes https://www.honeybeesuite.com/beekeeping-with-asian-hornets/ https://www.honeybeesuite.com/beekeeping-with-asian-hornets/#comment-230011 https://www.brighthubengineering.com/diy-electronics-devices/107500-indoor-mosquito-bats-explained/