Nesting biology of the Hudson´s Canastero ( Asthenes hudsoni ) and the Bearded Tachuri ( Polystictus pectoralis ), two threatened and poorly known birds of the Pampas grasslands

Distribution, migratory behavior, and conservation of Hudson’s Canastero Asthenes hudsoni (Furnariidae): a grassland specialist from the humid Pampas

“…We divided the year into two seasons with limits at the vernal and autumnal equinoxes: we considered breeding season records those obtained in spring and summer (22 September to 20 March), and non-breeding season records those obtained in autumn and winter (21 March to 21 September). This framework has been used before for birds of the humid pampas (Isacch and Martínez 2001) and is compatible with the information on breeding activity in A. hudsoni (Narosky et al 1983, Fraga and Narosky 1985, Salvador 2013, Trofino Falasco et al 2022). We then evaluated potential differences in the distribution of records (latitude and longitude) between breeding and non-breeding seasons using a non-parametric Mann-Whitney U test.…”