I'm looking for a series of fantasy novels I read in the '90s. One of them had the following cover featuring a general with eagle-like features, who was one of the main characters.
I think this is "El Devastador", book 3 of the series "El Reino de los Dragones" by "Richard A. Knaak". The cover image matches the tracing both in general pose and down to details such as the three-fingered hand with one slightly bent finger.
The original title of the book (which features different cover art) appears to be "Wolfhelm", from the (first) "Dragonrealm" series.
After having no success with many combinations of related terms in English (e.g. general/major/character/...; eagle/buzzard/hawk/falcon/...), I decided to broaden my search into other languages. Eventually, googling for
libro fantasia aguila general
brought up a cover image of this book.
The closest I can come to that particular image is the 1995 Baen imprint of The Eagle & the Nightingales by Mercedes Lackey, as seen here:
It's the 5th book in a series, but the bird seems to be lacking enough clothing for it to be the right pick, might be worth a look regardless.