15 days ago I related seeing American Crows on nest on the CU-Boulder campus. Now, over the past two days I have watched another (presumably) pair of crows undertake nest building. The nest is about 50-60 feet up in a honey locust about 50 feet outside my office window. I say that this is presumably another pair of crows because the nest is about 200 yards from the one I discussed earlier. Perhaps I should check to see if there is any activity over at that site. It could have failed due to wetness, wind or predation.
Monday morning I discovered the nest as I walked it after parking. I was alerted by odd and unfamiliar crying sounds that I quickly discovered to be emanating from a loose layer of sticks in the tree. Once in my office I was able to see crows fly in with twigs in their beaks. Each twig was 12 to 15 inches in length. Many of them had emerging greenery and they looked like they were coming from a nearby elm which was at about that stage of leafing out. Indeed, both just flew out of the elm into the nest with twigs. By this morning, the nest had grown considerably; it probably has a diameter of about two feet, is close to one foot deep and is dense enough to no longer be "see through". Occasionally one of the birds will bring some other type of material to the nest-it looks like mulch for nest lining perhaps. Through the morning they continued to bring twigs and weave them into the nest from the inside. Bill Kaempfer Boulder --~--~---------~--~----~------------~-------~--~----~ Join us at the 2009 Convention in Alamosa: http://cfo-link.org/convention/index.php You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to cobirds@googlegroups.com To unsubscribe from this group, send email to cobirds+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.as/group/cobirds?hl=en -~----------~----~----~----~------~----~------~--~---
