[Update: Oct. 23, 2018] Latest image showing highly-reflective glass—just installed for the Fine Arts Library project in Rand Hall at Cornell University—inviting bird collisions:
According to the Rand Hall Fine Arts Library’s June 18 to June 29, 2018 construction activity highlights and project update: “A full mock up window has been installed on the northern facade. It can be viewed from the sidewalk on University Avenue.”
Based on the trial window, shown in the image above, it seems likely that these highly-reflective windows will be problematic for birds: the windows appear (to the birds) as openings to trees and sky, thereby inviting collisions. There are better bird-safe glazing techniques that are widely known, for example using patterns on the glass that mimic the multi-pane steel-framed “factory” windows that were recently removed. For more information, see the American Bird Conservancy website.
[Update: July 9, 2018] Here’s another image of the same highly-reflective window.
[Updated Oct. 16, 2018: The image below shows how it looked on Oct. 8, 2018, with a few more windows installed.]
Additional writings and blog posts on the Rand Hall Fine Arts Library project are linked here.