Juvenile/fledgling Black-headed Grosbeaks make that call. We have listened to them for several years.
My recording abilities don't extend very far so I haven't succeeded in posting these calls. Hugh Kingery -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/9b2c7f9a-ad0d-4755-b37d-42694d52d072o%40googlegroups.com.
