Transcriber's Note:

Minor typographical errors have been corrected without note.
Page 204: "glottides" changed to "glottises."
Punctuation and spelling were made consistent when a predominant form was found in this book; otherwise they were not changed.
Ambiguous hyphens at the ends of lines were retained.
The American Golden-Eye illustration has been moved from page 231 to page 230 and the Skunk illustration from page 235 to page 233.
Duplicated section headings have been omitted.
The Contents table was added by the transcriber.
The index contains links to articles in other issues of Birds and Nature magazine: