A. nana may refer to: * Acanthiza nana, the Yellow Thornbill, a passerine bird species usually found in Australia * Acourtia nana, the dwarf desertpeony, a plant species in the genus Acourtia found in the Sonoran Desert * Amorpha nana, the dwarf indigo, dwarf indigobush, dwarf false indigo, fragrant indigo-bush, fragrant false indigo or dwarf wild indigo, a perennial shrub species native to North America * Aratinga nana, the Olive-throated Parakeet, a bird species * , the tiny pelican flower, a plant species in the genus Aristolochia