燕子銜泥壘大窩

yànzixiánnílěidàwō ㄧㄢˋ ˙ㄗ ㄒㄧㄢˊ ㄋㄧˊ ㄌㄟˇ ㄉㄚˋ ㄨㄛ

    • the swallow's nest is built one beakful of mud at a time (idiom)
    • many a little makes a mickle

Character by character

Saying俗语俗語

Proverb谚语諺語 · Widely known

Literally
swallows carry mud to build a big nest
Meaning
Persistent effort, bit by bit, achieves great things. Similar to 'little strokes fell great oaks'.

Sources