The Great Tit is a small bird characterized by bright plumage with a black head and white cheeks. Its back is olive green, while its chest is yellow with a distinctive black stripe running across it. Adult great tits measure about 14 cm in length. They feed mainly on insects, seeds, and fruit. They prefer wooded habitats, gardens, and parks. They nest in tree cavities or nest boxes, and the nesting season runs from spring through early summer.