Film commissioned to celebrate NYZS's seventy-fifth anniversary in 1970. The majority of the footage is from the 1960s and 1970s, but the reel opens up with early footage and still photography. There is some brief footage of the NYZS Building at the 1939-1940 World's Fair, the Institute for Research in Animal Behavior facility at the Bronx Zoo, the counstruction of the Osborn Laboratories of Marine Sciences, the opening of the World of Darkness and interior shots of that exhibit, dolphins at the New York Aquarium, and some exterior shots of the World of Birds building.