This is a rare nature film from the silent era in filmmaking. The subject (described by text cards) is the life of the cuckoo. The habits and behavior of the cuckoo were still a mystery in the 1920s, and this documentary explores all aspects of this cute and cuddly bird in great detail. The female Cuckoo abandons her duties as a mother once her eggs are laid, choosing instead to place her eggs in the nest of the same type of bird that she herself was hatched into. While the host bird initially puts up a fight, it eventually welcomes the baby cuckoo bird as its own, feeding and taking care of it until it is capable of surviving in the wild. Overall this film is a wonderful exploration of vintage nature filmmaking as well as adorable little birds.