Estrategias del uso del espacio y esfuerzo de forrajeo en dos especies de chipe Neotropicales (Parulidae) de parvada durante su periodo no reproductivo
DOI:
https://doi.org/10.22201/ib.20078706e.2026.97.5753Palabras clave:
Competencia, Chipe cachetes amarillos, Parvadas mixtas forrajeras, NeotrópicoResumen
Exploramos el uso de hábitat y esfuerzo de forrajeo en 2 especies migratorias, el chipe de cachetes amarillos y el chipe de Townsend (Parulidae) para identificar hábitats invernales y costos energéticos asociados con el comportamiento de grupo. Comparamos densidades, proporción sexo-edad y uso de sustratos de forrajeo dentro y entre especies en función de las condiciones ambientales en 2 paisajes con diferente proporción de cobertura forestal. Posteriormente, comparamos el área de distribución y el esfuerzo de forrajeo para identificar costos energéticos asociados al comportamiento de grupo. Las densidades y proporción de sexo-edad fueron diferentes para las 2 especies entre sitios de alta y baja calidad. El uso mayoritario de substratos interiores como ramas y troncos y estratos bajos en sotobosque fue observado en del chipe de Townsend, mientras que el chipe de cachetes amarillos utilizo con más frecuencia substratos externos como hojas, ramas inmaduras y el dosel. El ámbito hogareño del chipe de Townsend mostró superposición temporal con el área de parvadas sugiriendo potenciales beneficios adicionales al retener un territorio. La distancia de viaje, área de uso diario y tiempo de forrajeo fue mayor en sitios de menor calidad para ambas especies siendo el tamaño de grupo un factor determinante.
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