Birdcall

1. n. An instrument of any kind, as a whistle, used in making the sound of a birdcall.
2. n. A sound made in imitation of the note or cry of a bird for the purpose of decoying the bird or its mate.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.