Photo courtesy of the Evanston Public Library

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The Evanston Public Library’s main branch continued its tradition of hosting representatives from the Field Museum to band the peregrine falcons hatched there.

A pair of Peregrine Falcons has nested at Evanston Public Library for the past 11 years. For the last nine, Nona, the mother, and Squawker, the father, have nested together. On June 4, Nona and Squawker’s two newest chicks, or eyases, Wrigley and Tory, were banded and named by Field Museum bird specialists Mary Hennen and Josh Engel.

Nona and Squawker nested during the spring, and their two eggs hatched in May.  The babies are in the nest for about a month until they can fledge.

The falcons nest on the rafters just under the overhanging roof of the library.
To retrieve the eyases from the nest, Ms. Hennen opened a third-floor window and set up a ladder on the window ledge, which allowed her to reach the nest on
the rafters. She then brought the eyases down from the nest into the library and banded them where all in attendance could see. Peregrine falcons can be found on all continents except Antarctica, and about 20 pairs of them reside in the Chicago area. At one time, the species was on the Federal Endangered Species List. Scientists estimated that 90% of the North American population was lost. But it has since been declassified as endangered. The Evanston Public Library falcons can be viewed live at any time at

More information on the falcons can be found at