1990 Archaeopteryx fossil description

https://phys.org/news/2025-05-uv-ct-scans-scientists-hidden.html
https://www.nature.com/articles/s41586-025-08912-4
The nature paper is open access.
This is the 14th specimen of Archaeopteryx.  It is very well preserved and was found by a private collector in the 1990's, resold until the Chicago museum finally got the specimen, was able to prepare it correctly, and perform CT and tomographic scans.  Apparently soft tissues were preserved.  They found a new group of secondary wing feathers, and the extended data that you can get with the pdf download has an artist's picture of the wings outstretched.
duck wing:
https://www.fws.gov/harvestsurvey/wingID
bird wings:
https://abcbirds.org/blog/bird-wings/
Archaeopteryx seems to have an extra set of modified secondary feathers that modern birds do not have, though some modern birds have greatly increased the number of secondary wing feathers for long wings usually adapted for soaring.
Ron Okimoto