We're so happy to hear about the plans for window treatments at the Adkins Arboretum!
The one pedestrian walk at Hopkins does have a frit pattern, but it was intended as an art installation to create a soothing, mesmerizing feeling for patients. Since it leads to the Zayed Tower, the mark is modeled on an Arabic calligraphy brush stroke. The design isn't perfectly bird-safe because some of the etching is on the interior of the glass. Bird-safe patterning needs to be on the exterior of the glass to break up reflections, or to keep the bridge from seeming a clear pathway to a bird--glass is invisible. That said, it helps some.
"Testing has shown that most birds will not attempt to fly through horizontal spaces less than 2” high nor through vertical spaces 4” wide or less. This is widely referred to as the 2x4 rule."
The American Bird Conservancy is a great resource for glass solutions. The noted solutions so far are good ones--CollidEscape, Feather Friendly, BirdSavers.
An Adkins representative just reached out to us, Lights Out Baltimore, last night. We'll be happy to help. You might be aware of a number of our bird-safe installations that we've advised on or created. Feather Friendly dots/window film at the National Aquarium and Irvine Nature Center, Acopian BirdSavers at CCBC Dundalk, CollidEscape at the National Wildlife Visitor Center at the Patuxent Research Refuge, Feather Friendly tape at Lake Roland Nature Center, a variety of products to show options at the new Phoenix Wildlife Center, home-made decals at Creative Alliance, and more. We're always happy to give advice to both homeowners and organizational buildings. You can always contact our director, Lindsay Jacks, or me. There is a contact form on our website
http://www.lightsoutbaltimore.org/contact.html
Lynne Parks
Outreach Coordinator, Lights Out Baltimore
Baltimore, MD