By Subject of Literary Work - Nature
- Accident
- The Adventures of Tom Sawyer
- Advice to a Prophet
- The Airy Tomb
- Alfred North Whitehead
- Algernon Blackwood
- All Creatures Great and Small
- An Almanac for Moderns
- An American Childhood
- The American Notebooks
- American Poetry
- The American Scholar
- Among the Hills
- Anamnesis
- Anecdote of the Jar
- Anne of Green Gables
- The Ants
- Apparently with no surprise
- The Argentine Ant
- The Art of the Commonplace
- The Artist of the Beautiful
- As the Crow Flies
- The Ash
- Assembling California
- At Swim-Two-Birds
- At the Back of the North Wind
- At the Bottom of the River
- At the Fishhouses
- An Atlas of the Difficult World
- Audubon
- The Auroras of Autumn
- Autumn in the Oak Woods
- Axolotl
- The Azure
- Badger
- The Bait
- Balancing Acts
- Ballad of an Old Cypress
- Bambi
- The Baron in the Trees
- The Barred Owl
- The Bath
- Bavarian Gentians
- The Bear
- The Beaver Coat
- Big Two-Hearted River
- The Bight
- Birches
- A Bird came down the Walk—
- Black Robe
