Re: [cobirds] Re: Brown-headed Nuthatch in western KS

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

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