Blackcaps meaning : A small Old World warbler, Eurasian blackcap (Sylvia atricapilla), which is mainly grey with a black crown. Any of various species of titmouse (of the family Paridae), including the black-capped chickadee (Poecile atricapillus, syn. Parus atricapillus). An apple roasted until black, to be served in a dish of boiled custard. Whitebark raspberry (Rubus leucodermis).