Birder's Guide

NOV 2016

Birder's Guide is the American Birding Association's newest publication. Each issue focuses on a key subject, providing tips from experienced birders on a wide variety of topics like Travel, Listing & Taxonomy, Gear, and Conservation & Community.

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29 November 2016 | Birder's Guide to Gear the University of California, Santa Cruz. Researchers can use tissue samples, stomach contents, and additional fac- tors to study a dizzying array of infor- mation. Specimens can be tested to help us understand the impacts of pesticides, among other things. For example, egg- shell specimens from museums were in- strumental in helping link DDT to bird declines. Cost Estimates Based on a Large Window or Glass Door $ = free or very inexpensive, depending on what supplies you already have $$ = inexpensive but reasonable (depending on the scale of your project) $$$ = your generous budget is the limit Temporary Prevention/Concept Proofing Materials for Marking the Outside of the Window (may stain, smear, and/or fade) $ • Bar of soap, lipstick, fake frost, window paint, highlighter, dry-erase marker, string, tape (such as electrical, masking; beware of residue) $$ • UV liquid (Window Alert or craft paint) NOTE : Vertical stripes should be no more than 4 inches (10cm) apart. Horizontal stripes should be no more than 2 inches (5cm) apart. Checkerboard patterns of dots should follow similar spacing con- ventions. Include a healthy dose of cre- ativity with your material of choice! Temporary (or Long-Term) Materials for the Inside of the Window $ • Checkerboard of Post-it ® notes $ • Hang one CD or DVD per square foot (30cm) $$ • Install highly contrasting curtains (closed) with a busy, bold print Top: Mirrored glass is understandably confusing to birds, especially when sur - rounded by trees. Photo © Heidi Trudell Middle: Bird-safe glass should be encouraged as an architectural component, as seen here at Houston's Hobby Airport. The frosted horizontal lines meet the two-inch spacing guidelines and likely have a Low E (low emissivity). Photo © Heidi Trudell Bottom: The "corridor effect" is when birds are able to see completely through two panes of glass. Elevated walkways that connect buildings are especially hazardous, though many buildings have aspects of transparency. Photo © Heidi Trudell

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