2 Verbs to Use for the Word twitterings

They heard together the first sleepy twitterings of hidden birds; they saw the black shadows thinning; they watched the light come upon the peaks.

-16- Sunshine was gilding the grounds of Brinkley Court and the ear detected a marked twittering of birds in the ivy outside the window when I woke next morning to a new day.

2 Verbs to Use for the Word  twitterings