 The Puerto Rican vireo has a gray head, a white breast and a yellowish belly.The species measures, on average, 12 cm (4.72 in) and weighs from 11 to 12 grams (0.388–0.423 oz).An insectivore, the species's diet consists of grasshoppers, caterpillars, cicadas, beetles and aphids and is complemented with spiders, anoles, and berries.