Aves 4 Passeridae 4 Poospiza ornata 4 Saltatricula multicolor 4 Aggression 2 Amphispiza 2 Argentina 2 Cinnamomum verum 2 Diuca 2 Food resources 2 Fringillidae 2 Interspecific territoriality 2 Intraspecific territoriality 2 Larrea 2 Mendoza 2 Monte Desert 2 Playback experiments 2 Poospiza torquata 2 Prosopis 2 Reproductive resources 2 Zonotrichia capensis 2 avifauna 2 desert 2 food availability 2 food consumption 2 granivory 2 habitat type 2 microhabitat 2 seasonal variation 2 seed bank 2