Final Walden Biodiversity Report

My final summary report on the groupings of organisms and the people who found them during Walden Biodiversity Days in 2009 and 1998 is finished and can be downloaded here (5.7 MB). These events wouldn’t have been possible without hundreds of experts and helpers...

Berry Bad Guests: Invasive Aliens at the Dinner Table

In the run-up to Thanksgiving this week Shannon Mullen of National Public Radio interviewed me and Martha Stewart about Oriental Bittersweet, one of the most aggressively destructive invasive plants in the North East US and a staple of holiday decorations. Not...

Walden Biodiversity Day

On July 3rd and 4th I’ll be leading the second Walden Biodiversity Day, a gathering of top naturalists and field biologists — many of whom participated in the first Biodiversity Day in 1998 — who will fan out to find, identify and photograph over a thousand...

Return to Mazatlan

I’m returning to my roots in January 2009 with a series of tours out of Mazatlan, Mexico before, during and after the new Mazatlan Bird Festival. There are now hundreds of annual birds festivals, big and small, across North America and the Mazatlan Bird Festival...

Nature Deficit Disorder

Americans seem to know less and care less than ever about the natural world in their environs. As evidenced by the popularity of “action-oriented” nature shows and films about far away places, they are more interested in the cats of the African plains, the...