The 1c American Kestrel stamp was first issued in June 22, 1991. Then re-issued in May 11, 1995 with the denomination mark changing from "01" to "1c" and in January 20, 1996 with the format of coil. The design almost remains the same.

The Kestrel, a member of the falcon family, is the smallest falcon found in North America and, with one exception, the world. The American Kestrel is widely distributed throughout the Americas. Their breeding grounds range from Alaska to South America and an estimated 1.2 million breeding pairs make up the North American population alone.

 
 

Issue:	American Kestrel
Denomination & Type	01-cent	1 cent	01-cent
Format:		Panes of 100	Coils of 500 and 3,000
Series:	Wildlife
Issue Date & City:	June 22, 1991	May 11, 1995,  Aurora, CO	January 20, 1996,  New York, NY
Designer:		Michael R. Matherly, Cambridge City, IN
Art Director:		Joseph Brockert, Stamp Services, USPS
Typographer:		John Boyd, Annagraphics, New York, NY
Project Manager:		Joseph Brockert, Stamp Services, USPS	Vance Harris, Stamp Services, USPS
Manufacturing Process:		Offset Lithography	Offset
Printer:		Bureau of Engraving and Printing (BEP)	Bureau of Engraving and Printing
Printed at:		BEP	BEP, Washington, DC
Press Type:			Offset
Print Quantity:			50 million stamps (coil of 500) 300 million stamps (coil of 3,000)
Paper Type:		Non-phosphored	Non-phosphored
Gum Type:		Dextrin	Dextrin
Processed at:		Unknown	BEP, Washington, DC
Colors (PMS Colors):		Yellow, Magenta, Cyan and Black	Process yellow, magenta, cyan, and black
Image Area:		18.0 x 20.8 mm	18.0 x 20.8 mm
Overall Size:		21.3 x 25.1 mm	22.1 x 24.4 mm
Full Pane Size:		238.76 x 258.57 mm	N/A
Plate Size:			400 Subjects
Plate Numbers:		Four (4) Offset Numbers in a single group	Four (4) single digits
Marginal Markings:		"© USPS 1991, plat e position diagram, face value of pane"