Cream-backed Woodpecker

Characterized by its robust structure and considerable size, this species stands out as one of the larger members of its family, measuring between 11.8 and 12.6 inches (30 to 32 centimeters) in length and weighing approximately 250 grams. This taxon exhibits pronounced sexual dimorphism, particularly visible in the head ornamentation. The male displays a fully bright crimson-red head and prominent crest, with a small, circular, black-and-white patch located at the base of the lower mandible near the ear coverts. Conversely, the female exhibits a black forehead, throat, and anterior crown, offset by a striking cream-colored or yellowish malar stripe outlined in black that runs from the base of the bill below the eye to the side of the neck, while only the rear portion of her crest retains the red hue. In both sexes, the most defining field mark is the conspicuous cream-colored to pale buff back, which creates a sharp contrast against the deep solid black coloration of the wings, tail, and entire underparts. The bill is long, chisellike, and ivory-white in color, engineered for heavy excavation, while the iris is a striking, bright yellow.

Geographical distribution: Occurs as an endemic resident of the south-central regions of South America. Its primary range is tightly centered on the Gran Chaco biome, spanning across northern and central Argentina, western Paraguay, southeastern Bolivia, and reaching the southwestern borders of Brazil (mainly within the states of Rio Grande do Sul and Mato Grosso do Sul), as well as extreme northwestern Uruguay.

Habitat: Inhabits dry woodlands, savannas, Chacoan forests, transitional scrublands, gallery forests, and semi-open pastures with scattered mature trees. It shows a strong ecological preference for mature primary or undisturbed secondary forests containing a high density of old, dying, or dead standing trees, which are critical for foraging, communication, and reproduction. The species can tolerate moderate habitat modification, occasionally utilizing forest edges and fragmented woodlots, provided there are sufficiently large trees remaining.

Feeding: Sustains a primarily insectivorous diet, specializing in the extraction of wood-boring beetle larvae (principally from the families Cerambycidae and Buprestidae). Utilizing its powerful bill, it strips bark and excavates deep cavities into deadwood, using its long, specialized, barbed tongue to retrieve the concealed grubs. To a lesser extent, it also consumes other wood-dwelling invertebrates such as ants, termites, and spiders, and will opportunistically supplement its diet with wild fruits and sap during periods of low insect abundance.

Behavior: Lives typically as a solitary individual or in mated pairs, maintaining a highly territorial lifestyle. Its flight pattern is characterized by a heavy, deeply undulating motion, accompanied by a distinct rustling sound made by its wings. Vocalizations are loud, sharp, and metallic, but its most iconic communication method is the double-tap drumming, a rapid, resonant two-stroke signal characteristic of the genus Campephilus, used to declare territorial boundaries and communicate with its mate.

Nesting: Commences the breeding cycle with territorial displays and the careful selection of a nesting site. Both males and females collaborate in excavating a large, deep nest cavity inside the trunk of a living or dead hardwood tree, frequently preferring species like quebracho (Schinopsis spp.) or algarrobo (Prosopis spp.), at heights ranging from 13 to 40 feet (4 to 12 meters) above the ground. The female lays a clutch of 2 to 4 glossy white eggs. Incubation is shared by both parents and lasts approximately 15 to 17 days. Upon hatching, the altricial chicks are blind, naked, and entirely dependent on the parents, who feed them via regurgitation. The young remain inside the cavity for about 4 weeks before fledging and starting to forage under parental supervision.

Conservation status: Classified as a species of Least Concern (LC) on the IUCN Red List. Although the global population is considered stable, the species faces local threats due to rapid deforestation of the Gran Chaco, habitat fragmentation driven by agricultural expansion, and the selective logging of mature, dead trees, which significantly reduces the availability of essential feeding and nesting substrates.