Hi Cobirders, Because Dispersal is a function to spread genes and increase diversity, I would expect the source of wandering birds to not be from areas which are newly "colonized". Missouri's reintroduced birds did breed successfully, and there is abundant habitat to "fill in" within a few miles of the reintroduction location, let alone within a few counties away.
Because of all of the energy saving factors naturally built in to birds, I just can't see the Missouri birds leaving. In other species like Ruffed Grouse, there are well know factors in which young males up and fly long distances. The "Crazy flight" is a genetic mixing tool to increase diversity in sedentary bird populations and normally occurs from densely populated ones. So think about density as the major factor from where the birds originate. Look for highly concentrated areas, perhaps on eBird maps, and you might find ideas. Should a bird like that be captured and banded a very small amount of blood or tissue could be analyzed to find the markers indicating the source location. God forbid that it would be collected. Tim Birdman Productions Choteau, MT BIrdman Adventures Mokane, MO On Sunday, October 24, 2021 at 11:48:06 AM UTC-5 davidto...@gmail.com wrote: > I believe it was determined that all the birds reintroduced in Missouri > were banded, and this one isn't. But I suppose it could be an offspring to > them if those birds successfully bred and the young weren't banded. > > > David > > El dom., 24 de octubre de 2021 10:03 a. m., Dave Cameron <dave...@msn.com> > escribió: > >> Brown-headed Nuthatch was re-introduced last year in the Ozarks in >> Missouri. Possibly this is a wandering member of that population. >> >> Dave Cameron >> Denver >> >> On Friday, October 22, 2021 at 10:03:06 AM UTC-6 Brandon wrote: >> >>> Colorado birders should be on the lookout for this species. One is in >>> Garden City, Kansas, only 70 miles from the Colorado border. A few >>> Colorado birders got to see it yesterday morning. Since Pygmy Nuthatches >>> aren't really wandering around this fall, if you see one in eastern >>> Colorado, be sure it isn't a Brown-headed Nuthatch and let us know. >>> Colorado hasn't had this species so far. The bird in Garden City, is the >>> furthest west one to be found ever. >>> >>> Brandon Percival >>> Pueblo West, CO >>> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Colorado Birds" group. >> To post to this group, send email to cob...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/cobirds?hl=en?hl=en >> * All posts should be signed with the poster's full name and city. >> Include bird species and location in the subject line when appropriate >> * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ >> --- >> 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 cobirds+u...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/cobirds/872232c7-8db5-48fa-9480-141e95afa8cdn%40googlegroups.com >> >> <https://groups.google.com/d/msgid/cobirds/872232c7-8db5-48fa-9480-141e95afa8cdn%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- -- 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 * All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ --- 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 cobirds+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/59528f95-2ba1-4843-bf3f-db47d9196aacn%40googlegroups.com.
