When I was a kid in the 1960s, my family watched the Walt Disney program on Sunday evenings, like most families. It was one of the few programs the entire family could watch together.
I remember watching a particular show called Waterbirds, a 1952 short documentary about several bird species that live in water. It featured a few minutes of Western grebes (Aechmophorus occidentalis) performing mating displays set to classical music.
