LiEagle is an aerial LiDAR surveying system designed for large area and long-range 3D data collection projects. The system is designed to be mounted to a helicopter platform and features a Riegl VUX-1LR laser scanner coupled with a best-in-class inertial measurement unit (IMU) for increased point cloud accuracy and precision. The LiEagle is well-suited for projects aiming to map terrain features beneath forest canopies and extract structural parameters from forest LiDAR data. The centimeter-level accuracy of this measurement device will meet the rigorous accuracy demands of civil engineering and critical infrastructure maintenance professionals. And an optional high-definition (50 megapixels) digital camera module can be used to generate photogrammetry products as well as true color 3D point clouds during each LiDAR survey.