There are two main types of nestling. One is the downy precocial chick like the Grey Partridge (Perdix perdix) and the other the naked altricial nestling, the typical song-bird nestling like Blackcap (Sylvia atricapilla). The precocial or nidifugous chick is active soon after hatching and able to leave the nest if necessary. The altricial or nidicolous nestling hatching naked, blind and helpless. They are wholly dependent by its parents.
Watercolour painting, size A4