Crossbills  (Loxia ) are the most highly developed members of the Finch family, characterized by having the tips of the upper and lower bills crossing so as to facilitate extraction of seeds. Males are reddish, females brownish olive in general coloration. The crossbill lives chiefly in the pine plantations, where it feeds for the most part on the seeds of the pine, cleverly opening the cones with its pointed beak. It hatches in all seasons of the year.