For More Information About Trees

* Fairfax County offers answers to common questions at www.fairfaxcounty.gov/dpwes/environmental/trees.htm; click on "FAQs -- Tree Care and Tree Issues." For an overview of the county's urban forestry program, visit www.fairfaxcounty.gov/nvswcd/newsletter/urbanforestry.htm.

* The Virginia Department of Forestry discusses tree identification and offers a tree planting guide at www.dof.virginia.gov/index.html.

* The state's big-tree database is at www.fw.vt.edu/4h/bigtree. Jeffrey L. Kirwan, an extension specialist at Virginia Tech, is working on a book about trees in the state that are remarkable -- and not necessarily for their size. To nominate a tree of particular aesthetic or historical significance, send an e-mail to Kirwan at jkirwan@vt.edu.

* American Forests says it is the nation's oldest nonprofit citizens' conservation organization. The group maintains a national register of big trees at www.americanforests.org/resources/bigtrees.

* Fairfax ReLeaf Inc. is a nonprofit group whose volunteers plant and preserve trees and restore habitat on public land in Northern Virginia. The group's Web site is at www.geocities.com/RainForest/5663/history.html.

* To find a certified arborist, visit www.goodtreecare.com/search/index.cfm.

Ben Wharton, a county urban forester, visits Huntley Meadows Park, above, and Scotts Run Nature Preserve, below, to check on trees.