Definition of "chirping"

Let the songs be loud and cheerful, and not chirpings or pulings.

1625, Francis [Bacon], “Of Masques and Triumphs”, in The Essayes […], 3rd edition, London: […] Iohn Haviland for Hanna Barret

We heard the peculiar note of the woodcock, which resembles the repeated croaking of the frog, followed by a sharp hissing sound, somewhat like the noisy chirping of the wagtail[.]

1886, Peter Christen Asbjørnsen, translated by H.L. Brækstad, Folk and Fairy Tales, page 85

Adler's prose seeks to catch the whispers and chirpings of insanity rather than the lamentations of suffering.

2009 January 11, Richard Lourie, “Displaced Minds”, in New York Times‎