The northernmost species of Diglossa, the Cinnamon-bellied Flowerpiercer is a distinctive species, being the only flowerpiercer over the vast majority of its distribution. It inhabits the montane pine-oak, cypress, and fir forests of the highlands (1500-3300 m) of northern Central America, from southern Mexico to northern Nicaragua. It also occurs on the edges of forests, in clearings, and in previously cultivated areas; wherever blooms proliferate, this perky nectar robber will find them. Male Cinnamon-bellied Flowerpiercers are blue-gray above and over the head and breast, with the rest of the underparts chestnut-colored, and possess a strikingly pale base of the lower mandible. Females, like those of several other closely related Diglossa, are largely olive-brown above with warmer-colored underparts, and also have a less noticeable pale base to the bill. Much of its breeding biology and its population status are unknown.