Ringed woodpecker

The ringed woodpecker (Celeus torquatus), also known by its Latin name Picus torquatus, is a species of bird belonging to the woodpecker family, Picidae. It inhabits a broad swathe of South America, being found in every mainland country on the continent with the exception of Argentina, Chile, Paraguay, and Uruguay. This species is characterized by its pale cinnamon head, which often has a rufous tinge, and a moderately bushy crest. Adult males are distinguished by a red patch on their face, extending from the malar area to under the ear coverts, a feature absent in females.

Taxonomy and Subspecies

The ringed woodpecker was first described by Georges-Louis Leclerc, Comte de Buffon, in 1780. Later, Pieter Boddaert formally coined the binomial name Picus torquatus. While historically placed in its own genus, it is now recognized within the genus Celeus. The species is divided into three subspecies: C. t. torquatus, C. t. occidentalis, and C. t. tinnunculus. However, some ornithological bodies, such as BirdLife International, recognize the latter two as distinct species based on plumage differences, though no genetic studies have confirmed this split.

Distribution and Habitat

The distribution of the ringed woodpecker varies by subspecies. C. t. torquatus is found in northeastern Venezuela, the Guianas, and northern Amazonian Brazil. C. t. occidentalis inhabits southeastern Colombia, southern Venezuela, northeastern Ecuador, eastern Peru, northern Bolivia, and western and central Amazonian Brazil. C. t. tinnunculus is restricted to the Atlantic Forest in the eastern Brazilian states of Bahia and Espírito Santo.

The preferred habitats also differ. C. t. torquatus and C. t. occidentalis primarily inhabit tall, humid tropical forests, including terra firme, várzea, secondary forests, gallery forests, and cerrado, and can be found at elevations up to 950 meters. In contrast, C. t. tinnunculus is found exclusively in large tracts of closed-canopy Atlantic Forest at lower elevations, typically between sea level and 100 meters.

Behavior and Diet

The ringed woodpecker is a year-round resident throughout its extensive range, exhibiting no migratory behavior. Its diet is diverse, including ants, seeds, and fruits. Foraging methods are varied and include gleaning food from surfaces, chiseling into wood to access insects, and hammering at arboreal termitaria to obtain prey. They typically forage alone or in pairs, but may also join small groups or mixed-species feeding flocks in some areas.

Vocalizations

The vocalizations of the ringed woodpecker's subspecies are quite similar. They produce a distinct 'primary call' consisting of a series of loud, ringing whistles. Another vocalization is the 'rising call,' a series of strident whistles that gradually increase in pitch and amplitude. They also have a 'whinny,' a rapid series of shrill notes. While both sexes drum, it is infrequent, characterized by a steady pace of knocks.

Conservation Status

The conservation status of the ringed woodpecker is assessed individually for each subspecies. C. t. torquatus is listed as Near Threatened, facing threats from accelerating deforestation in the Amazon Basin due to cattle ranching and soy production. C. t. occidentalis is classified as Least Concern, with no immediate threats identified despite a decreasing population trend. C. t. tinnunculus is listed as Vulnerable due to its limited range and the severe fragmentation and loss of its Atlantic Forest habitat, primarily from agricultural and plantation expansion.