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window ledge, wings crossed above drooping tail, big round eyes set forward 
on flat head, dark mustache, all marking him plainly as a falcon. Many a 
business man keeps a pair of binoculars on his desk and knows the favorite 
cornice which is a duck hawk’s perch. 
The duck hawk has not only invaded Chicago but is a frequent visitor 
to lower Manhattan. He nests on the Palisades of the Hudson and has been 
known to cross to New York City and return with a pigeon in fifteen 
minutes round trip. Such speed, skill and endurance are worthy of the 
duck hawk which is the closest relative of the peregrine falcon of Europe. 
There he has been prized for falconry for centuries. 
CHICAGO ACADEMY OF SCIENCES PHOTO 
Immature duck hawk 
The pigeon and starling which furnish the duck hawk with tasty meals 
and so have lured him into our cities are themselves descended from inhabi- 
tants of rocky gorges. The ancestor of our common pigeon, the rock dove 
of the Old World, nested on precipitous cliffs. Having been domesticated 
in ancient times, pigeons have developed into many breeds. Although most 
of them in the loop nest in dove-cotes, many have found nesting sites on 
