Here are the first-day postmarks for this issue:The Digital Color Postmark measures 2.04″ x 1.0″The pictorial postmark measures 2.39″ x 1.0″

Updated April 21^st from the Postal Bulletin
On May 19, 2023, in Wall, SD, the United States Postal Service® will issue the Endangered Species stamps (Forever® priced at the First-Class Mail® rate) in 20 designs, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 483800). These stamps will go on sale nationwide May 19, 2023, and must not be sold or canceled before the first-day-of-issue. The Endangered Species commemorative pane of 20 stamps must not be split and the stamps must not be sold individually.

Featuring 20 different endangered animals, these 20 stamps pay tribute to the Endangered Species Act and mark the 50th anniversary of the legislation. The stamp art showcases photographs of endangered animals found within the 50 states and American territories and possessions, as well as two North American species living near U.S. borders. The images are among more than 13,000 in photographer Joel Sartore’s “Photo Ark,” his project to document as many animal species as possible. Art director Derry Noyes designed the stamps with Sartore‘s existing photographs.

No automatic distribution.

How to Order the First-Day of Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at store.usps.com/store/home. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

FDOI – Endangered Species Stamps
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900

After applying the first-day-of-issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by September 19, 2023.

Technical Specifications:

Issue: Endangered Species Stamps
Item Number: 483800
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 20 (20 designs)
Series: N/A
Issue Date & City: May 19, 2023, Wall, SD 57790
Art Director: Derry Noyes, Washington, DC
Designer: Derry Noyes, Washington, DC
Existing Photos: Joel Sartore
Modeler: Sandra Lane / Michelle Finn
Manufacturing Process: Offset, Flexographic
Printer: Banknote Corporation of America
Press Type: Gallus 74
Stamps per Pane: 20
Print Quantity: 30,000,000 stamps
Paper Type: Phosphor Tagged Paper, Block
Adhesive Type: Pressure-sensitive
Colors: Cyan, Magenta, Yellow, Black, Opaque White
Stamp Orientation: Horizontal
Image Area (w x h): 1.42 x 1.085 in / 36.068 x 27.559 mm
Overall Size (w x h): 1.56 x 1.225 in / 39.624 x 31.115 mm
Full Pane Size (w x h): 7.48 x 9.0 in / 189.992 x 228.60 mm
Press Sheets Size (w x h): 14.96 x 18.00 in / 379.984 x 457.20 mm
Plate Size: 80 stamps per revolution
Plate Number: “B” followed by five (5) single digits
Marginal Markings:
Front: Header: Endangered Species • Plate number in two corners of the pane
Back: ©2022 USPS • USPS logo • Two barcodes (483800) • Plate position diagram (4) • Promotional text

[ceremony details] [click on any of the pictures for larger versions]
Postal Service Spotlights Endangered Species

What: The U.S. Postal Service will commemorate the 50th anniversary of the Endangered Species Act (ESA) by issuing a pane of stamps featuring 20 photos of different endangered animals.