The crown is the top of the head, or the whole head.
Crown can mean the top of the head and it can also mean the whole head. In the study of human anatomy the terms "Calvaria, "skullcap", "skull cap", or the "roof of the cranial cavity" are used for the top part of the head.
In bird anatomy, the crown is the top of the head, or more specifically the zone from the frons, or forehead, extending posteriorally to the occiput and laterally on both sides to the temples. The upper part of the head, including frons, crown and occiput, is sometimes called the pileum. A bird with a crest covering the pileum may be described as "pileated", e.g. the pileated woodpecker.
The garganey (Spatula querquedula) is a small dabbling duck. It breeds in much of Europe and western Asia, but is strictly migratory, with the entire population moving to southern Africa, India (in particular Santragachi), Bangladesh (in the natural reservoirs of Sylhet district) and Australasia in winter, where large flocks can occur. This species was first described by Linnaeus in 1758. Like other small ducks such as the common teal, this species rises easily from the water with a fast twisting wader-like flight.
Their breeding habitat is grassland adjacent to shallow marshes and steppe lakes.