鸟笼 

Pinyin: niǎo lóng  
Meaning：Bird cage
Sentence: 老人想买一个鸟笼。The old man wants to buy a cage for birds.

More: 

鸟：

Pinyin: niǎo
Meaning: bird
Radical: 鸟
Stokes: 5
Traditional: 鳥
Common words/Phrase: 
鸟巢 [niǎo cháo] 【bird's nest】
鸟瞰 [niǎo kàn] 【bird's-eye view】
鸟笼 [niǎo long] 【birdcage】
鸟鸣 [niǎo míng] 【twitter; warble】
鸟嘴 [niǎo zuǐ] 【beak】

笼： 

Pinyin: lóng,lǒng 
Meaning: Cage
Radical: 龙
Stokes: 11
Traditional: 籠
Common words/Phrase:
笼络 [lǒng luò] 【come round】
笼屉 [lóng tì] 【bamboo or wooden utensil for steaming food; food steamer】
笼屋 [lóng wū] 【cage house】
笼子 [lóng zi] 【cage】