Query: Flora of the United States but not the Southwestern region that is also bird food.
Domain: plants
Relevant documents:
Vaccinium corymbosum
Sporobolus heterolepis
Ribes sanguineum
Ribes
Ribes triste
Rosa virginiana
Symphoricarpos occidentalis
Magnolia virginiana
Rhus trilobata
Hesperaloe parviflora
Mahonia pinnata
Iochroma arborescens
Prunus caroliniana
Ribes divaricatum
Ilex verticillata
Symphoricarpos mollis
Prunus emarginata
Symphoricarpos acutus
Croton setiger