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David Herlocker is the interpretive naturalist for the Marin County Open Space District. He leads walks all over Marin County throughout the year.


Ask the Naturalist: The Secret of the Slender Redwoods

September 03, 2015 by David Herlocker

Why are some stands of redwoods so spindly? Marin County Parks naturalist David Herlocker explains this anomaly.

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A Bird in the Hole

April 01, 2010 by David Herlocker

Imagine raising your kids on a precarious bunch of sticks on a tree branch. Some birds had the same thought: Yikes! These cavity-nesters take shelter by excavating nest holes in trees, or by using existing holes--in trees, cliffs, buildings, bridges, tractors...

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At Home Under the Log

January 01, 2010 by David Herlocker

A world awaits discovery under almost any humble log in winter, whether it’s in your backyard or deep in the woods. Lift that log and make some new discoveries. Just be sure to put that log back carefully...


Bay Nature