Are crows monogamous?

two crows Originally uploaded by mikE~510
I regularly peruse crow photographs on flickr. Today I found this one. What an excellent photograph, don't you think? Under the photograph the question was asked, "Are crows monogamous?" Are crows monogamous? Are ravens monogamous? I thought this would be a good post for today. Yes, crows and ravens are monogamous. They generally mate for life. They are social birds. John M. Marzluff and Tony Angell stated the following about crows in their book In the Company of Crows and Ravens, "Crows and ravens care for each other, spend years living at home, engage in foreplay, and mate for life but now and then mate with others. Large groups cooperate to sleep in safety, drive away mutual enemies, and maybe even dole out justice." Interesting, eh? We could learn a thing or two from crows and ravens. Maybe being close with family and friends is not just for the birds... Thanks to mikE~510 for the photograph, the question and the inspiration to write this post!