While this thread is about crows, I can't recommend Bernd Heinrich's books, many of which feature his relationship with ravens, highly enough. A Year in the Maine Woods [1] is a classic. Mind of the Raven [2] and Ravens in Winter [3] may be of interest to anyone following this thread and since I am speaking about ravens in a thread about crows, an Audubon article "How to Tell a Raven from a Crow" [4] may also be of interest.

[1] - https://www.goodreads.com/book/show/77166.A_Year_in_the_Main... [2] - https://www.goodreads.com/book/show/254704.Mind_of_the_Raven [3] - https://www.goodreads.com/book/show/122665.Ravens_in_Winter [4] - https://www.audubon.org/news/how-tell-raven-crow