...Both twitter merrily but neitherreally sings... 
Neltje Blanchan 「Birds Every Child Should Know」
...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」
...A flock of half-a-dozen or more birds having astarling-like appearance, which twitter like stares and keep to thetopmost branches of trees, may be set down safely as spotted-wings...
Douglas Dewar 「Birds of the Indian Hills」
..."Just hear how those birds twitter," remarked one of the ladies,looking up into our tree...
Virginia Sharpe Patterson 「Dickey Downy」
...The foiled shrike, with an angryand astonished twitter, flew off to a tree across the pool...
Charles G. D. Roberts 「The Watchers of the Trails」
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