Dictionary.com
Thesaurus.com

duck hawk

American  

noun

  1. a peregrine falcon of the American subspecies Falco peregrinus anatum, noted for its especially swift flight.

duck hawk British  

noun

  1. a variety of peregrine falcon, Falco peregrinus anatum, occurring in North America

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of duck hawk

An Americanism dating back to 1805–15

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.