Also sometimes known as the Yellow-billed Blue Finch, a rather unnecessarily long name, this Cerrado endemic is almost confined to Brazil, where it ranges from the state of Maranhão in the north as far south as Sao Paulo, albeit always being a local and uncommon bird, with a small extension of its range into eastern Bolivia. The slender yellow bill is immediately distinctive in all plumages, as it is only breeding-plumaged males that are clad in bright cobalt blue; note also their dull reddish legs. Females, in contrast, are chiefly rufous-brown above, streaked dusky over a buffy whitish background below. In the post-breeding season, both sexes gather into small flocks, which feed unobtrusively on the ground. However, when nesting, males perch prominently atop a low perch, on a tree or rock, uttering their sweet, thin songs for prolonged periods, both during the morning and afternoon. Blue Finches inhabit open grassy cerrados and the species is undoubtedly declining due to the widespread and virtually unchecked conversion, degradation, and fragmentation of such grasslands due to agricultural expansion.