biological survey

Crown‐mapping involves measurements of heights, diameters, distances, and azimuths of all branches. Here Jim Spickler (left) extends a steel tape to measure the horizontal extension of a dead branch while Bob Van Pelt (right) records the measurement. Photo by Stephen Sillett, Institute for Redwood Ecology, Humboldt State University

Countdown to BioBlitz!

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In 21 days we will have a major scientific event happening throughout the Bay Area: the 2014 National Park Service BioBlitz. Here at the League we are busy preparing for this 24-hour exploration of the ecologically diverse areas of the Continued

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