• Introduction - G. C. Ruhle
• Booby Crows - Dr. R. R. Huestis
• Fox Sparrows Breeding On The Rim - Dr. R. R. Huestis
• Rosy Finches - Dr. R. R. Huestis
• Birds Of The Park In Winter - Dr. G. C. Ruhle
• Forster's Tern - Dr. Ruth E. Hopson
• Renewal Of Beaver Activity In Copeland Creek - W. S. Vincent
• Deer Observations - O. L. Wallis
• Bat Recorded From Wizard Island - O. L. Wallis
• Pacific Marten - O. L. Wallis
• Wolf! Wolf! - Dr. G. C. Ruhle
• Fish And Stream Survey - O. L. Wallis
• Visibility Disc Replaced - O. L. Wallis
• Rainbows In Pools On Wizard Island - O. L. Wallis
• The 1947 Catch In Crater Lake - O. L. Wallis
• A Check List Of Amphibians And Reptiles Of Crater Lake National Park - W. S. Vincent
• First Record Of The California Yellow-legged Frog In Park - W. S. Vincent
• Early Spring Flowers At Crater Lake National Park - Dr. Ruth E. Hopson
• A Visitor Learns About Lichens - Gordon P. Walker
• Evolution In Action - Gordon P. Walker
• The Future Wizard Peninsula - L. T. Grose
• Travel Record - Clyde E. Gilbert
• Redcloud Rock Slide - L. T. Grose
• The Uniformed Naturalists Of 1947 - Dr. G. C. Ruhle
• Crater Lake Natural History Association

Disclaimer: With the exception of corrections to a few grammatical errors (to improve readability), Nature Notes is reproduced as it was originally published. Much has been learned about the natural history of Crater Lake National Park since these notes were first published, rendering some of the original conclusions inaccurate or invalid, just as determinations of today may be rendered "obsolete" 50-60 years hence. The reader is advised to consult more recent literature to obtain a current understanding of the topic.