One sentence frame, one new word per verse, and each verse repeats everything that came before, newest first. That structure is why Alouette has survived since at least 1879: it is a memory game disguised as a song, and by the last verse you have recited the bird's anatomy six times without noticing you were drilling.
The grammatical gift is - "I will pluck you". That final -ai is the future tense, and this song will plant it deeper than any conjugation table, because you sing it about thirty times.
A warning about the subject matter, in case the jaunty tune misled you: the singer is cheerfully itemising which parts of a lark they intend to de-feather. French Canada sang it while plucking birds for the pot. Folk songs are like this - see also the English one about the cradle falling out of the tree.