On 21 July 2007 Shirley Sturts emailed Doug Schonewald of the Washington Bird Records Committee to inquire about records of Harris's Hawk from that state. Here is Doug's response.
From: "Doug Schonewald"
To: "Shirley Sturts"
Sent: Thursday,
July 26, 2007 10:06 PM
Subject: RE: Harris' Hawk question
I am not aware of any records in Washington. I do have some feelers out there for older records that may have been rejected.
There is one report that was never submitted to the records committee of a Harris's Hawk some years back (and that is secend-second-second hand), but this bird was wearing jesses and obviously an escaped falconry bird. A note should be made that Harris's Hawk is a very popular bird for beginning and intermediate falconers as they prove their ability to manage and train birds. A bird of this type is required before a falconer can move on to true falcons. This training process is overseen by a Master Falconer and is a rigorous process before someone can own and hunt the premier birds such as Prairie, Peregrine, or Gyr
Utah recently voted on a record based [sic] and that vote is in the second round and will likely be rejected based on origin.
Hope that this information is of some value.
Cheers,
Doug