A Quantitative Study of the Nocturnal Migration of Birds
by George H. Lowery
Publisher: University of Kansas 1951
The nocturnal migration of birds is a phenomenon that long has intrigued zoologists the world over. Yet, despite this universal interest, most of the fundamental aspects of the problem remain shrouded in uncertainty and conjecture.
Home page url
Download or read it online for free here:
by W. P. Pycraft - Gay & Hancock ltd.
The wings of the bird not only lift the body from the earth, but they sustain it in the air by their marvellously complex movements. And this is true, in varying degrees of bird, and bat, and butterfly: of dragon-fly and beetle ...
by Charles Dixon - Bliss, Sands and Foster
Amongst the many natural objects that confront the visitor to the sea, there are none more readily detected than birds. The wide waters of the ocean and its varied coast-line of cliff or sand, are the haunts of many birds of specialised type.
by Neltje Blanchan - Doubleday, Page & Company
An introductory acquaintance with 150 birds commonly found in the gardens, meadows, and woods about our homes. The purpose of the writer is to give, in a popular and accessible form, knowledge which is accurate and reliable about the life of birds.
by Chester A. Reed - Doubleday, Page and Co.
An illustrated dictionary of North American birds. You will find more than seven hundred birds illustrated, with hundreds of photographs. This guide gives you the information you need to make a quick identification of any bird you are likely to meet.