Sometimes the simplest solution is the most efficient!
Fascinating to hear that scientists in Norway have found that painting one of the three blades on a wind turbine black reduces avian deaths by 72%.
In the paper, the scientists explain why birds are susceptible to flying into rotating turbine blades and why a single black blade helps them to perceive the rotor as an obstacle.
“Relative to humans, birds have a narrow binocular [eg, using both eyes to focus on one object] frontal field of view and likely use their monocular [using each eye independently] and high‐resolution lateral fields of view [ie, having eyes on opposite sides of their heads] for detecting predators, conspecifics [ie, birds of the same species], and prey,” the authors write.
“Within an assumed open airspace, birds may therefore not always perceive obstructions ahead, thereby enhancing the risk of collision. To reduce collision susceptibility, provision of ‘passive’ visual cues may enhance the visibility of the rotor blades, enabling birds to take evasive action in due time.”
It is thought that birds see the rotating white blades as a “motion smear” — the blur effect humans see when waving a hand quickly in front of their eyes — and do not perceive this blur as a moving object.
Painting one blade black is believed to create motion smear patterns that the bird perceives as a moving object, “as the frontal vision in birds may be more tuned for the direction of movement”.
It is always a possibility to have a traffic accident with any kind of animal but for the people involved in this accident, to think that videoing the consequences is more important rather than calling the authorities for immediate help is very disturbing to say the least.
In the video the bear manages to cross the barrier with an obvious broken leg and other injuries. Although the authorities have searched for the bear it has not been found and one would presume that it would have died by now
Whats new at Wildside Holidays? Three new excellent companies added to Wildside Holidays. Based in Spain and offering cycling, walking, hiking and more!
Work is ongoing at our other websites as well (see below) and after all the confusion and stress of the coronavirus hopefully things will return to a kind of normal sometime soon.
Right now it s upwards of 40 degrees in the Sierra de Grazalema and by 11am its too hot for all that walking and cycling! However its a good excuse to sit inside in the shade with a cold beer and write some articles for our websites. 🙂