A charge is any object or figure placed on a heraldic shield or on any other object of an armorial composition. Any object found in nature or technology may appear as a heraldic charge in armory. Charges can be animals, objects, or geometric shapes. Apart from the ordinaries, the most frequent charges are the cross – with its hundreds of variations – and the lion and eagle. Other common animals are stags, wild boars, martlets, and fish. Dragons, bats, unicorns, griffins, and more exotic monsters appear as charges and as supporters.