sentences:  The AOC was formed with the explicit aim of promoting the study of birds.The pattern established in the early years and still maintained is that the club has an evening meeting and a Sunday outing each month except for December and January.Meetings typically include an address on a subject of relevance to ornithology, a section called bird notes devoted to recent sightings of interest, and "bird of the month", a section presented by a club member and offering a brief view of a particular bird species or bird family.