Announced by the USPS on October 24, 2022.
Under the Endangered Species Act, which marks its 50th anniversary in 2023, more than 1,300 imperiled plant and animal species are safeguarded to increase their chances of survival. With this pane of 20 stamps, the Postal Service presents a photographic portfolio of 20 representative endangered animal species. Those featured are found within the 50 states and U.S. territories and possessions or 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.
New information will appear below the line, with the most recent at the top.
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 21st 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.
The first-day-of-issue event for the Endangered Species Forever stamps is free and open to the public.
News of the stamps is being shared with the hashtags #EndangeredSpeciesStamps and #ESA50.
Who: Peter Pastre, vice president, government relations and public policy, USPS
Martha Williams, director, U.S. Fish and Wildlife Service
Joel Sartore, National Geographic Explorer and photographer
When: Friday, May 19, 2023, at 11 a.m. MT
Where: National Grasslands Visitor Center
708 Main St., Wall, SD 57790
https://www.fs.usda.gov/recarea/nebraska/recarea/?recid=10639
RSVP: Dedication ceremony attendees are encouraged to RSVP at usps.com/endangeredspecies
Background: The stamps showcase photographs of endangered animals found within the 50 states and U.S. territories, as well as two North American species living near U.S. 
borders.
The 20 images are from thousands in National Geographic Explorer and photographer Joel Sartore’s “National Geographic Photo Ark,” a project to document every species living in the world’s zoos, aquariums and wildlife sanctuaries, inspire action through education, and help protect wildlife by supporting on-the-ground conservation efforts.
On Dec. 27, 1973, President Richard Nixon signed the ESA into law, following a unanimous Senate vote. In the 50 years since, other nations worldwide have emulated the 
pioneering U.S. initiative. The ESA provides a framework to conserve and protect endangered and threatened species and their habitats both domestically and abroad.
Under the ESA, more than 1,670 U.S. species and 698 foreign species are safeguarded to increase their chances of survival. Scientists estimate that hundreds of species have been rescued from the brink of extinction in the United States since the ESA began. A species found to need protection is listed under the ESA as either threatened or endangered, the latter defined as “in danger of extinction throughout all or a significant portion of its range.”
Under the Endangered Species Act, which marks its 50th anniversary in 2023, more than 1,300 imperiled plant and animal species are safeguarded to increase their chances of survival. With this pane of 20 stamps, the Postal Service presents a photographic portfolio of 20 representative endangered animal species. Those featured are found within the 50 states and U.S. territories and possessions or 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.
