bats

Totally Batty Workshop!

Through the Western Section of the The Wildlife Society we were able to attend a workshop for the Ecology and Field Methods for the study of bats. During our habitat assessments for projects, we encounter numerous local bat species which are listed Species of Special Concern (SSC) by the California Department of Fish and Wildlife.

The California Environmental Quality Act (CEQA; California Public Resources Code §§ 21000-21177) requires State agencies, local governments, and special districts to evaluate and disclose impacts from "projects" in the State. Section 15380 of the CEQA Guidelines clearly indicates that species of special concern should be included in an analysis of project impacts if they can be shown to meet the criteria of sensitivity outlined therein.

This workshop combined lecture, discussion, and field exercises regarding ecology and conservation of California bats, covering species accounts, physiology, anatomy, behavioral ecology, conservation issues, and mitigation strategies. We employed field techniques of mist-netting, assessing species presence or absence, and acoustic monitoring to gain hands-on experience in monitoring and analysis. During evening field excursions we typically captured a half dozen bat species and, for those with proof of current rabies vaccination, we were allowed practice in extracting, handling, as well as collecting and recording data from captured bats. The following is a list of bats in Humboldt County that are commonly observed.

Scientific Name Common Name

  • Antrozous pallidus pallid bat

  • Corynorhinus townsendii Townsend's big-eared bat

  • Lasionycteris noctivagans silver-haired bat

  • Lasiurus blossevillii western red bat

  • Lasiurus cinereus hoary bat

  • Myotis evotis long-eared myotis

  • Myotis thysanodes fringed myotis

  • Myotis volans long-legged myotis

  • Myotis yumanensis Yuma myotis

Find your own ways to learn more about these creatures, which are extrememly important for pest-control and ecology. Here are some links to get you started!

Bats of the Humboldt Redwoods

The Wildlife Society

Information Regarding Species of Special Concern

Why Bats are Important

Build Your Own Bat House

Classroom portion-Taxonomy, identification and ecology

Classroom portion-Taxonomy, identification and ecology

Mist nets going up

Mist nets going up

Male Myotis

Male Myotis