Resource Links

Tree Maintenance


Selecting, Planting and Maintaining Trees

Toxicology Information, Pesticides

Calif. Contractors State License Board
Check a License for Validity

California Oak Foundation
A wealth of information about native California oaks, their status and protection. A good source of downloadable information, including Compatible Plants Under and Around Oaks, an excellent landscape guide.

Forest Management Sites


Sudden Oak Death, California Oak Mortality Task Force
The comprehensive central resource for SOD information, including maps of infection locations in the state.

National Forests in California

California Forest Pests Council

Ancient Tree Database

National Forest Service Library, Index of Natural Resource Publications

California ReLeaf organizes grassroots efforts toward planting and protecting California urban trees.

Professional Tree Organizations


International Society of Arboriculture
Confirm arborists certification here

Western Chapter, International Society of Arboriculture

American Society of Consulting Arborists
Information about consulting arborists, confirmation of Registered Consulting Arborists

California Arborists Association

Tree Care Industry Association

California Urban Forest Council

Miscellaneous Interest


Animated Knots by Grog
I love this one. For all who have learned to tie a bowline, now you can watch the rabbit jump out of the hole, run around the tree and dive back into the hole.

Tom Volk's Fungi
Excellent resource for all things fungal

California Wild Plants

U.S. Department of Agriculture Plants Database
Standardized database of plants in the U.S.

Photograph Sites


Forestry Images
Photographs of forests, pests, diseases, wildfire

Insect Photos

Joseph McNeil Consulting Arborist | Pleasant Hill

Serving northern California and the western United States, including Walnut Creek, Alamo, Danville, Lafayette, Orinda, Pleasant Hill and San Ramon, California.