Provided is a wind turbine having at least one lighting device, which has a light source and emission device, wherein the light source and the emission device are arranged at different positions of the wind turbine, wherein at least one positioning device is provided which, by a positioning section, is coupled to the emission device in such a way that the emission device can be moved between a first position and a second position by a movement of the positioning section.

Provided is a wind turbine having at least one lighting device, which has a light source and emission device, wherein the light source and the emission device are arranged at different positions of the wind turbine, wherein at least one positioning device is provided which, by a positioning section, is coupled to the emission device in such a way that the emission device can be moved between a first position and a second position by a movement of the positioning section.

Through wall lighting optical element for arrangement in a through hole of a wall of a wind turbine, comprising: a light source; a light transmitting element comprising a first end and a second end opposite to the first end, wherein the first end is coupled with the light source, wherein the first end is to be located inside the wall; and a light directing element coupled with the second end of the light transmitting element for directing light outwardly from the through hole of the wall.

Through wall lighting optical element for arrangement in a through hole of a wall of a wind turbine, comprising: a light source; a light transmitting element comprising a first end and a second end opposite to the first end, wherein the first end is coupled with the light source, wherein the first end is to be located inside the wall; and a light directing element coupled with the second end of the light transmitting element for directing light outwardly from the through hole of the wall.

Methods of determining the species of birds in flight are provided along with corresponding systems. A method may include capturing a video stream of a bird in flight using at least one camera, generating a first species probability estimate by delivering images from the video stream to a neural network that has been trained to recognize species of birds from images, obtaining additional parameters from the video stream or from additional data, generating a second species probability estimate by delivering the additional parameters as input to a domain knowledge module with a domain knowledge statistical model, and generating a final species probability estimate by combining the first species probability estimate and the second species probability estimate. The additional parameters may include geometry features related to movement of the bird in flight, or parameters relating to the environment.

An aircraft beacon light is provided for emitting flashes of red light into an environment around an aircraft. The aircraft beacon light includes a support plate having a central portion; a plurality of LEDs, arranged on the support plate around the central portion and facing away from the support plate; an annular light splitting element, having a proximate side arranged over and facing the plurality of LEDs, wherein the proximate side has reflective portions and transmissive portions; and at least one light conditioning element for redirecting light having passed through the transmissive portions of the proximate side of the annular light splitting element.

Provided herein are detection systems and related methods for detecting moving objects in an airspace surrounding the detection system. In an aspect, the moving object is a flying animal and the detection system comprises a first imager and a second imager that determines position of the moving object and for moving objects within a user selected distance from the system the system determines whether the moving object is a flying animal, such as a bird or bat. The systems and methods are compatible with wind turbines to identify avian(s) of interest in airspace around wind turbines and, if necessary, take action to minimize avian strike by a wind turbine blade.

Provided herein are detection systems and related methods for detecting moving objects in an airspace surrounding the detection system. In an aspect, the moving object is a flying animal and the detection system comprises a first imager and a second imager that determines position of the moving object and for moving objects within a user selected distance from the system the system determines whether the moving object is a flying animal, such as a bird or bat. The systems and methods are compatible with wind turbines to identify avian(s) of interest in airspace around wind turbines and, if necessary, take action to minimize avian strike by a wind turbine blade.

An automated system for mitigating risk from a wind turbine includes a plurality of optical imaging sensors. A controller receives and analyzes images from the optical imaging sensors to automatically send a signal to curtail operation of the wind turbine to a predetermined risk mitigating level when the controller determines from images received from the optical imaging sensors that an airborne animal is at risk from the wind turbine.

An automated system for mitigating risk from a wind turbine includes a plurality of optical imaging sensors. A controller receives and analyzes images from the optical imaging sensors to automatically send a signal to curtail operation of the wind turbine to a predetermined risk mitigating level when the controller determines from images received from the optical imaging sensors that an airborne animal is at risk from the wind turbine.