Hi all, I have followed CObirds as a reader for years and posted twice. I saw this bird several times in Costa Rica last year. AS I have read all the posts about natural arrival vs escaped I thought about the reports from Red Rocks on the other Zonotrichia birds. I am not a research expert on migration or other movement issues. Could the other rarities migrate to a location where there are Rufous-collared regularly and set up with them and in some way "convinced" a Rufous-collared to join it in a trip north. We see mixed flocks often and when you have the other 4 but only one of each at a place like Red Rocks does it seem impossible that the fifth could have traveled up with others and then gone to Georgetown with maybe some early White-crowned, for example. Has any one seen any of the other Zonotrichia in the area in Georgetown? Just another thought on how and why it could be a natural rather than an escaped. Buzz Schaumberg Aurora
-- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/cobirds?hl=en.
