A Mountain Chickadee and Black-capped Chickadee have been hanging around together in my yard, each taking seed from my feeder for the past month. They follow each from tree to tree or tree to ground chattering to each other. I have seen only these two chickadees. The Black-capped has been singing for the past couple of weeks, but I have not heard the Mountain Chickadee sing. I have heard of rare instances of hybridization between these two species and found a link on the internet that documents one such a case in British Columbia:
http://www.birds.cornell.edu/pfw/News/ChickadeeHybrid2006.htm And another one in Colorado: *Martin, Stephen G. and Kathy Anne Martin. 1996. Hybridization between a Mountain Chickadee and Black-capped Chickadee in Colorado. *Colorado Field Journal*, Vol. 30, No. 2, pp. 60-65. I'll see how this situation in my yard unfolds! Paula Hansley Louisville Boulder Co. -- 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 For more options, visit this group at http://groups.google.com/group/cobirds?hl=en?hl=en
