Plain Wren at Tapanti (2 Viewers)

[Andy Adcock]

Can anyone tell me which of the three way split occurs here, do we know for sure?

It seems to be right on the boundary line for Isthmian and and Cabanis's?



A

 

[njlarsen]

from a post I made here: http://www.birdforum.net/showthread.php?p=3260115

I did not see this elsewhere in Birdforum, so a little on range:
modestus seems to be at Jaco on the CR west cost and north of there, and reach to San Jose and the higher areas east of there.
zeledoni seems to be lower on the slope east of San Jose.
elutus reaches north to San Isidro de El General, San Jose, Costa Rica, and is found from there to central Panama.
The break between modestus and elutus seems to be between Jaco and San Isidro de El General, but the authors state they have not investigated it further.

Probably is another couple of details in that thread.

Niels

 

[Andy Adcock]

Thanks Niels,
Tapanti is right on the transition line I think so could be either?

Btw, re the La Paz Waterfall thread, Black-bellied Hummer and the Antpitta I asked about are both at Tapanti too.

Andy

 

[Andy Adcock]

I just downloaded calls from Xeno canto, one from Punta Arenas which should be Cabanis's and one from Las Esquinas which should be Isthmian according to the distribution?


Thanks, A

 

[njlarsen]

Thanks Niels,
Tapanti is right on the transition line I think so could be either?

Btw, re the La Paz Waterfall thread, Black-bellied Hummer and the Antpitta I asked about are both at Tapanti too.

Andy

Re the wren: I remember one of them as a more lowland while the other would be the main one to find in the highlands?

Any way, go to ebird, explore data, hotspots, and the bar graph for Tipanti is looking like this: http://ebird.org/ebird/GuideMe?cmd=decisionPage&getLocations=hotspots&hotspots=L447854&yr=all&m=

Niels

 

[Andy Adcock]

Thanks again Niels, this has them as Cabanis's....

A

 

[njlarsen]

Thanks again Niels, this has them as Cabanis's....

A

If you explore other locations in the region, my guess is that you need to be lower in elevation to get Isthmian. possibly also more south or west or both.

Niels

 

[Andy Adcock]

If you explore other locations in the region, my guess is that you need to be lower in elevation to get Isthmian. possibly also more south or west or both.

Niels

Maybe Esquinas?

I honestly think though Niels that the ranges are poorly understood at the moment.

Andy

 

[njlarsen]

You will need to go back into the thread I linked to and also read the actual AUK paper to get all the details that are available. You can also take a look at page 64 and the surrounding pages in this document: http://checklist.aou.org/assets/proposals/PDF/2016-C.pdf

Niels

 

[Andy Adcock]

You will need to go back into the thread I linked to and also read the actual AUK paper to get all the details that are available. You can also take a look at page 64 and the surrounding pages in this document: http://checklist.aou.org/assets/proposals/PDF/2016-C.pdf

Niels

Many thanks again Niels but it's still extremely vague.

Looking at the map in the paper, why couldn't they have used a normal map, it's impossible to get anything other than a vague idea of where things are!

Cane break seems straightforward but the transition zone between eleutus and zeledoni is still guesswork it seems. I suppose an understanding of habitat preference will help.



Cheers, Andy

 

[Birdingcraft]

Yes, Cabanis's around Tapanti.
Bird anywhere south of Jaco and Isthmian is common in edge and second growth, including Esquinas area.

 

[Andy Adcock]

Yes, Cabanis's around Tapanti.
Bird anywhere south of Jaco and Isthmian is common in edge and second growth, including Esquinas area.

Excellent Pat, much appreciated.



Andy