And let's not forget that ravens have some of the most complex social behavior of any animal species. Great book on the subject: http://www.goodreads.com/book/show/122665.Ravens_in_Winter
……虽然这个帖子是在聊乌鸦（crows），但我怎么推荐 Bernd Heinrich 的书都不为过，他的很多书都描写了他和渡鸦（ravens）的关系。《A Year in the Maine Woods》[1] 是一部经典。《Mind of the Raven》[2] 和《Ravens in Winter》[3] 可能会让关注这个帖子的朋友感兴趣；既然我在一个聊乌鸦的帖子里聊起了渡鸦，那么奥杜邦的一篇文章《如何区分渡鸦和乌鸦》[4] 也可能会让你感兴趣。[1]……
…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]…
而且别忘了，渡鸦拥有所有动物物种中最复杂的社会行为之一。关于这个话题的一本好书：http://www.goodreads.com/book/show/122665.Ravens_in_Winter
And let's not forget that ravens have some of the most complex social behavior of any animal species. Great book on the subject: http://www.goodreads.com/book/show/122665.Ravens_in_Winter
听起来很像我从《Ravens in Winter》（https://www.goodreads.com/book/show/122665.Ravens_in_Winter）里学到的东西，非常棒的一本书。
Sounds like what I learned from Ravens in Winter (https://www.goodreads.com/book/show/122665.Ravens_in_Winter) an excellent read.
……虽然这个帖子是在聊乌鸦（crows），但我怎么推荐 Bernd Heinrich 的书都不为过，他的很多书都描写了他和渡鸦（ravens）的关系。《A Year in the Maine Woods》[1] 是一部经典。《Mind of the Raven》[2] 和《Ravens in Winter》[3] 可能会让关注这个帖子的朋友感兴趣；既然我在一个聊乌鸦的帖子里聊起了渡鸦，那么奥杜邦的一篇文章《如何区分渡鸦和乌鸦》[4] 也可能会让你感兴趣。[1]……
…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]…
我非常推荐读一读 Bernd Heinrich 写的《Ravens in Winter》https://jake-reich.co.uk/blog/17
I really recommend reading "Ravens in Winter" by Bernd Heinrich https://jake-reich.co.uk/blog/17
我强烈推荐《Ravens in Winter》这本书，它展现了这些鸟类的社会结构到底有多复杂和高阶。
I can highly recommend the book "Ravens in Winter" that shows just how complex and advanced the social structure is of these birds.
对这个话题感兴趣的人，我强烈推荐《Ravens in Winter》这本书。
I strongly recommend the book Ravens in Winter for anyone interested in this topic.