PEEPER • FREE-TRANSLATOR.COM • Definition of Peeper

... swift bird, the swiftest of all the birds, is the eagle, when he takes his descending stoop from his place away up in the sky. He cleaves the air like a bullet, and so swift is his career that the eye can scarcely trace his flight. But, hark! all is still now, save the piping notes of the little peeper along the shore. Wait, however, a moment. There, hear that venerable podunker off to the right, with his deep bass, like the sound of a brazen serpent. Listen! another deep voice on the left has fallen in. There, another right over against us! another and another still! a ...

— Wild Northern Scenes - Sporting Adventures with the Rifle and the Rod • S. H. Hammond