Resumen

GORLERI, Fabricio C.  y  ROESLER, Ignacio. FROM MONTE TO CHACO: EBIRD REVEALS THE MIGRATION OF THE STRANECK’S TYRANNULET (SERPOPHAGA GRISEICAPILLA). Hornero [online]. 2022, vol.37, n.1, pp.1-1. ISSN 0073-3407.

The Straneck’s Tyrannulet (Serpophaga griseicapilla) is a small migratory flycat-cher that completes its annual cycle within southern South America, and which appears to breed exclusively in Argentina However, as a recently described species, historical records are lacking, and several aspects of its migratory ecology are still poorly studied. In this study, the new records of the Straneck’s Tyrannulet available in the eBird database are analyzed to describe the species migration and phenology. Species distribution models (Random Forests) and abundance models (GAMs) were used to predict its (1) seasonal distribution, (2) habitat associations, and (3) migratory phenology. Further evidence that the Straneck’s Tyrannulet is an endemic bree-der of Argentina, with the southern Monte being the species’ main breeding region, is provided. After breeding, the Straneck’s Tyrannulet migrates to the north and overwinters in the plains of the Argentine Mesopotamia (from March to October) and the Chaco region (from May to October), where it is mostly sighted in shrublands near watercourses. The species makes a notable migratory passage in autumn and spring (with peaks in mid-April and mid-September) through the arid Chaco and the sierras of Córdoba and San Luis, suggesting a poten-tial migratory route. Also, further evidence of the enormous value of new citizen science databases for recons-tructing migratory and phenological patterns in birds is presented. The qualitative and quantitative increase of these records will enable more precise and detailed ecological insights.

Palabras clave : Citizen science; Generalized Additive Models; Neotropics; phenology; Random Forest; Species Distribution Models; Tyrannidae.

        · resumen en Español     · texto en Español     · Español ( pdf )