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Spatial Heterogeneity in Resource Distribution Promotes Facultative Sociality in Two Trans-Saharan Migratory Birds
- Ainara Cortés-Avizanda,
- Pablo Almaraz,
- Martina Carrete,
- José A. Sánchez-Zapata,
- Antonio Delgado,
- Fernando Hiraldo,
- José A. Donázar
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- Published: June 22, 2011
- https://doi.org/10.1371/journal.pone.0021016