Records of nesting behavior of the Long-billed Woodcreeper (Nasica longirostris) in an artificial structure in Yasuní National Park, Ecuador

Abstract

The long-billed woodcreeper (Nasica longirostris) is a neotropical bird species in the family Furnariidae with very limited information about its breeding habits. We observed a nest from 5 to 10 February 2025 at the Pontificia Universidad Católica del Ecuador Scientific Station in Yasuní National Park, Orellana. Clutch size, number of chicks, visit frequency and duration, and prey types were recorded. The nest was located inside a metal pipe in a clearing beside the Tiputini River and contained dry bark at the base. This is the first known record of N. longirostris nesting in an artificial structure. We recorded 8 total hours of nest activity over 4 days before the chicks fledged. Two chicks were fed by two adults. Most parental visits occurred in the evening and increased in duration near fledging. Chick diet consisted of arthropods, including cockroaches and beetles. These data add novel insights into the reproductive biology of N. longirostris near fledging.