We’re getting questions about the nighttime illumination of our nests. Are we bothering the eagles at night? Here’s how it works. What we see - visible light - is just a tiny fraction of all the light that exists. Infrared, ultraviolet, X-rays, gamma rays, microwaves, and radio waves are all forms of electromagnetic radiation. Together, they make up the electromagnetic spectrum. Like humans, birds cannot see beyond about 700 nanometers: the upper limit of visible red light. Infrared (IR) light f