Bats at the Redwood Treetop


If you’ve stood in the redwoods near dusk, no doubt you glimpsed bats darting above you. I love to see them, especially when I’m camping, because I know they are hunting pesky mosquitoes. A new research study by Jean-Paul Kennedy, Continued

Bats of Humboldt Redwoods


Last week, we drove into Humboldt Redwoods State Park at dusk to watch bats dart over Bull Creek. We joined up with USDA Forest Service researcher, Ted Weller, and his team as they studied local and migrating bats through the Continued

Silver-haired bats mate in redwood forests. Photo by Theodore J. Weller

Redwood Forests May Be Crucial for Silver-Haired Bats


A US Forest Service ecologist, Weller decided to check out his own backyard: the redwood forests of Northwest California. He not only found bat activity in winter, but also important clues about the bats’ migrations. When Weller had surveyed a common species called the silver-haired bat in summer, he’d found almost all males. In the winter, however, he began to catch females right away. So he asked Save the Redwoods League to fund research to figure out what was going on. Learn more about this research.

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Big brown bat. Photo by Don Pfitzer, USFWS

Bats in Giant Sequoias


Prior to this study, little was known about the bat community in Yosemite’s three giant sequoia groves and virtually nothing was known about how bats use the canopy in any of the Parks’ forests. Dr. Elizabeth Pierson, Dr. William Rainey, and Leslie Chow carried out major research to study bat roosting behavior in fire-scarred hollows at the base of sequoia trees, bat feeding behavior in association with a variety of habitats, and bat activity in the giant sequoia canopy. In addition, they combined observations from this study and others to describe the natural history of Yosemite’s 18 bat species. Learn more about this research.

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