The Blue-billed Curassow Crax albe rti (Cracidae) is a critically endangered Colombian endemic, about which little information has been published. Updating the available information on its status and distribution is therefore of high priority for developing plans for its conservation. In this paper we present 33 records of C. alberti and observations on its natural history obtained in January and February 1999, December 2000 and January 2001 in the northeastern Central Andes in the department of Antioquia, Colombia. We found that during the breeding season, the “booming” vocalizations of the males were the best clue to the species presence. We confirmed the existence of C. alberti in the municipalities of Puerto Berrío and Remedios, and obtained the first records for the municipalities of Maceo and Anorí. The forests where this species was found had a highly diverse, heterogeneous vegetation; the smallest forest fragments in which we found it had areas of ca. 300 ha. Two nests found in secondary forest, apparently the first described for the species, were simple platforms surrounded by many lianas. This species is well known to and appreciated by the local communities and therefore could be used as a flagship species to highlight conservation of the last fragments of forest in this region.