COMPORTAMIENTO DE INCUBACIÓN DE CHORORÓ (TARABA MAJOR) Y CHOCA CO‐ MÚN (THAMNOPHILUS CAERULESCENS) EN ARGENTINA

ALEJANDRO A. SCHAAF; GIOVANA PERALTA; AYELEN LUCZYWO; AGUSTÍN DÍAZ; SUSANA I. PELUC

ORNITOLOGIA NEOTROPICAL

NEOTROPICAL ORNITHOLOGICAL SOC

Año: 2016

1075-4377

The Thamnophilidae family comprises approximately 200 species of passeriforme birds. Even though in the last yearsthere has been advancement in the knowledge of the reproductive biology of many of those species, there are stillspecies for which several reproductive parameters are unknown. With this work we contribute to the knowledge ofthe reproductive biology of the Great Antshrike (Taraba major) and the Variable Antshrike (Thamnophilus caerulescens)mainly providing data on their incubation behavior in the province of Córdoba, Argentina, corresponding totheir southernmost distribution. We recorded clutch size, total duration of the incubation period, and other variablesassociated with incubation behavior by means of remote sensors and direct observations. In both species, adultsshared incubation duties and nest attentiveness was high (T. major: 91.46%; T. caerulescens: 92.52%). The pattern ofincubation for daylight hours was different between the species. In the case of T. major, the duration of on and offbouts increased during the course of the day, and the number of bouts decreased. In contrast, for T. caerulescens bothvariables remained constant throughout the day. The data provided in this study enriches our knowledge of the reproductivebiology of understudied Thamnophilidae species, and are useful as baseline information to investigate the factorsthat shape parental care behaviors in these birds.