Ibala leMidlalo leSizwe laseBeijing, ngokusemthethweni elibizwa ngokuba yiNational Stadium[3] (isiTshayina: 国家体育场; i-pinyin: Guójiā Tǐyùchǎng; ngokoqobo: "Ibala leMidlalo leSizwe"), ekwaziwa ngokuba yiBird's Nest (鸟巢; Niǎocháo), libala lemidlalo eliseBeijing. Eli bala lemidlalo (BNS) layilwa ngokudibeneyo ngabayili bezakhiwo uJacques Herzog kunye noPierre de Meuron baseHerzog & de Meuron, umyili weprojekthi uStefan Marbach, umzobi u-Ai Weiwei, kunye neCADG eyayikhokelwa ngumyili wezakhiwo oyintloko uLi Xinggang.[4] Eli bala lemidlalo lenzelwe ukusetyenziswa kuyo yonke iOlimpiki yasehlotyeni ka-2008 kunye neParalympics kwaye liza kusetyenziswa kwakhona kwiOlimpiki yasebusika kunye neParalympics ka-2022. I-Bird's Nest ngamanye amaxesha inezikrini ezinkulu zexeshana ezifakwe kwiindawo zokuma zebala lemidlalo.