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Characterization of the Worthen Sparrow (Spizella wortheni)’s Nest Building Materials in Northeastern Mexico
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Characterization of the Worthen Sparrow (Spizella wortheni)’s Nest Building Materials in Northeastern Mexico
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Journal Article
Characterization of the Worthen Sparrow (Spizella wortheni)’s Nest Building Materials in Northeastern Mexico
2024
Overview
The study was conducted within a well-managed beef cattle operation in northeastern Mexico. Each nest was weighed and dissected to obtain the plant and animal material used to build the nests. The number of materials present per nest and relative frequency were determined. Twenty-one building materials were used. Over the years, Muhlenbergia torreyi represented 85.5% of the total biomass of the nests, and Aristida longiseta, Bouteloua gracilis, Brickellia canescens, Purshia mexicana and Cirsium ehrenbergii constituted 2.45, 2.80, 2.44, 1.34 and 1.11% of the total biomass, respectively. The above-mentioned grasses represented 95.62% of the total biomass. Material of animal origin was horse and cow hair, which represented 0.84 and 0.58% of the total biomass, respectively. It was concluded that, at the study site, Muhlenbergia torreyi was a key nest-building material for the Worthen sparrow nest.
