The Yellow-Faced Parrotlet's presence in ornithological literature dates to its formal description by Philip Lutley Sclater in 1858, but for more than a century after that initial publication, references to the species in scientific and popular bird literature remained sparse. The remoteness of its Maranon Valley habitat and the difficulty of accessing the region meant that firsthand observational accounts were rare, and most references to Forpus xanthops in 19th and early 20th century texts relied heavily on the original type specimens and a limited number of subsequent collections. The species appeared as little more than a brief entry in comprehensive parrot monographs, often with minimal information about behavior, ecology, or population status.
This began to change in the latter decades of the 20th century as Neotropical ornithology matured as a discipline and field access to the Peruvian Andes improved. Joseph Forshaw's landmark reference work on the parrots of the world included progressively more detailed accounts of the Yellow-Faced Parrotlet in successive editions, drawing on new field data and captive observations. Regional field guides covering Peru's birds, including the widely used guides by Schulenberg, Stotz, Lane, O'Neill, and Parker, gave the species proper treatment with range maps, plumage descriptions, and habitat notes that made it accessible to visiting birders and researchers for the first time.
The publication of specialized parrotlet monographs and avicultural reference books further elevated the species' profile in print. Authors focusing specifically on the genus Forpus devoted chapters to the Yellow-Faced Parrotlet's husbandry, breeding biology, and distinctive morphology, providing a depth of coverage that general parrot references could not match. These specialist texts became essential resources for breeders and keepers, circulating within the avicultural community and contributing to the knowledge base that supported successful captive propagation.
More recently, the Yellow-Faced Parrotlet has appeared in conservation-focused publications and reports produced by organizations such as BirdLife International and the IUCN. Species action plans, red list assessments, and regional biodiversity surveys have documented the parrotlet's population trends and habitat requirements, ensuring that the species is represented not only in hobbyist literature but also in the scientific and policy documents that inform conservation decision-making. This body of literature, while modest compared to that devoted to larger and more widely distributed parrots, provides a solid foundation for understanding the species' biology and cultural context.