...Otherwise there was no noise but the twitter of small birds and thenight wind in the tops of the beeches... 
John Buchan 「Mr. Standfast」
...
The giggling twitter of the bank swallows as they wheel and dartthrough the air above you, proves that they are never too busy huntingfor a dinner to speak a cheerful word to their friends...
Neltje Blanchan 「Birds Every Child Should Know」
...A metallic twitter, and by the male,a long-drawn, glassy kluck-tse-e-e; and watery gurglingnotes uttered with spread wings and tail...
Frank M. Chapman 「Color Key to North American Birds」
... But the poor tired little fellowheard neither the white bear's growl nor the gray robin's twitter...
Lenore Elizabeth Mulets 「Stories of Birds」
..." And then he burst into a giggling twitter...
Lenore Elizabeth Mulets 「Stories of Birds」
...During the hottest part of the day they perch intrees and hold a concert, if such a term may be applied to atorrent of sibilant twitter...
Douglas Dewar 「A Bird Calendar for Northern India」
...The cheerful little lals inside the cagesoon begin to twitter and sing, and their calls attract the wildamadavats in the vicinity...
Douglas Dewar 「A Bird Calendar for Northern India」
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