The common buttonquail resembles the common quail, it has streaked sandy brown upperparts, buff underparts with black flank markings, and a plain face. In flight, a whitish wingbar contrasts with the grey wing.
By the meteorological calendar, winter always starts on 1 December. The seasons are defined as Spring (March, April, May), Summer (June, July, August), Autumn (September, October, November) and Winter (December, January, February).
A snow-covered park in Pittsburgh, Pennsylvania, during winter. Winter is the coldest season of the year in polar and temperate climates, between autumn and spring. Winter is caused by the axis of the Earth in that hemisphere being oriented away from the Sun. Different cultures define different dates as the start of winter, and some use a definition based on weather. When it is winter in the Northern Hemisphere, it is summer in the Southern Hemisphere, and vice versa.