Which of the following is a potential hazard during UAS operations?

Bird strikes represent a significant hazard during UAS operations, as they can lead to severe damage or even a total loss of the unmanned aircraft. In scenarios where drones are flying in areas populated by birds—such as near bodies of water, agricultural fields, or during migration seasons—the risk of collision increases. This can not only jeopardize the UAS but also pose risks to safety, such as falling debris or the potential for causing accidents if the UAS malfunctions due to impact. Understanding and mitigating this hazard is essential for safe UAS operation.

The other choices do not represent hazards: increased operational efficiency and enhanced imaging capabilities highlight the benefits of UAS technology rather than risks. Maintaining visual line of sight is a crucial operational practice that helps reduce risks but is not a hazard in itself.