Thank you for contacting Mearto. These are 15 signed wildlife photographs by David Goodnow. From my research, it appears that he worked during the 1950s through at least the 70s and has done covers for Sports Illustrated and other magazines. I also found an interesting newspaper article about him, and a book he wrote. Please see my links below. I was unable to locate any sales records of Goodnow’s work.

There is damage on some of the photos, which will affect the price. A portfolio of this size, of original signed photos by a known photographer can sell for between $200 and $400.

https://www.mcall.com/news/mc-xpm-1997-10-17-3177027-story.html

https://www.amazon.com/How-Birds-Fly-David-Goodnow/dp/0963424408

(Price is for digital license)
https://www.gettyimages.com/detail/news-photo/david-goodnow-trying-to-get-an-owl-down-from-a-tree-news-photo/50876028

https://www.wolfgangs.com/vintage-magazines/sports-illustrated/vintage-magazine/OMS07257.html