I was involved with bird impact with aircraft deterrence during my time as a USAF pilot. Though there are many techniques, from bright lights and loud sounds, to shotguns and poison, none of these work particularly well. But much more to the point is the fact that trying to keep birds away from airplanes is inherently a very different issue than keeping birds a way from concentrating solar plants or wind mills.
In the case of windmills and concentrating solar plants we want to keep birds away to save the birds, not the solar or wind installation. In the case of bird strikes on aircraft the bigger issue is protecting the plane and passengers. A fried bird at a concentrating solar plant is bad for the bird but does nothing to the power plant. Likewise, it is rare that a bird impact on a wind turbine will do substantial damage to the turbine, but it is likely to kill the bird. A bird impact on a high speed aircraft, which includes virtually all commercial and military aircraft, can do tremendous damage, up to and including total loss of the aircraft (and loss of life).