Final answer:
Investigating the cut-and-paste ornithology in long-tailed widowbirds is part of zoology, which is a branch of biology focused on studying animals, including bird behaviors and their ecological distribution.
Step-by-step explanation:
Investigating the phenomenon of cut-and-paste ornithology in long-tailed widowbirds falls under the academic field of zoology, which is the scientific study of animal behavior, structure, physiology, classification, and distribution. Zoology is a branch of biology that specifically focuses on the animal kingdom. This field encompasses various activities such as the recording of bird behavior, often using tools like video cameras, as outlined in the reference material. Additionally, experts like ornithologists, who study birds, utilize tagging and monitoring techniques to track populations and their migratory patterns, an activity that relates to the study of the long-tailed widowbirds' behavior mentioned in the question.
Fundamental to the understanding of ornithological research and the study of birds' physiological and evolutionary adaptations is biogeography. Biogeography includes various sub-disciplines such as ecological biogeography, historical biogeography, and conservation biogeography, all of which play a role in comprehending the distribution and ecological dynamics of bird species, including the long-tailed widowbirds.