March 1, 2021

Colorado’s Hairstreak Butterfly Featured on New Stamp for Irregularly Shaped Cards

Hairstreak Butterfly stamp


The shimmering purple of the Colorado hairstreak butterfly will be commemorated by the U.S. Postal Service as the eighth stamp in the non-machineable butterfly stamp series.

The virtual dedication event for the Colorado Hairstreak stamp is free and open to the public. News of the stamp is being shared with the hashtag #ColoradoHairstreakstamps.


William D. Zollars, Board of Governors, U.S. Postal Service

Dr. Paul A. Opler, Professor, Department of Agricultural Biology, Colorado State University


Tuesday, March 9, 2021, at 11:30 a.m. EST


The virtual stamp event will be hosted on the U.S. Postal Service Facebook and Twitter pages.


Please visit for details of the virtual stamp dedication ceremony.


Colorado’s state insect, the vibrant Colorado hairstreak, lives among oak trees in that state and the rest of the Four Corners states — Arizona, New Mexico and Utah — as well as eastern Nevada, southern Wyoming and northern Mexico.

Colorado hairstreak caterpillars hatch in the spring from eggs laid the previous autumn. Plump and green with white fuzz, they feed on the tender new leaves of their host plant, the Gambel oak (Quercus gambelii), also known as the “scrub oak.”

After metamorphosis, the butterfly emerges from its cocoon in late spring or summer. The butterflies dart in and out of the tree’s branches, feeding on the tree’s sap and fallen raindrops. Mature males look for females receptive to mating. Later, the female lays her eggs singly on the host plant and the cycle of life begins anew not far from their ancestral home. In its entire life, the Colorado hairstreak may travel no more than a few yards from where it hatched.

These colorful square non-machineable surcharge stamps were developed in collaboration with the greeting card industry and will be issued in panes of 20 for use on irregular-size envelopes, such as square greeting cards, invitations or announcements. The words “NON-MACHINEABLE SURCHARGE” on the stamp indicate its usage value. The stamp is being issued at the current rate of 75 cents and, like a Forever stamp, this stamp will always be valid for the class of mail printed on it.

Postal Products

Customers may purchase stamps and other philatelic products through the Postal Store at, by calling 800-STAMP24 (800-782-6724), by mail through USA Philatelic or at Post Office locations nationwide.

The Postal Service receives no tax dollars for operating expenses and relies on the sale of postage, products and services to fund its operations.



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