Boreal/Tengmalm's Owl Split...other Boreal splits? (1 Viewer)

Mysticete

Well-known member

• Apr 16, 2009

• #1

Something interesting that was mentioned in a tangent yesterday in population ecology was that some unpublished work by Koopman and one of the prof's former students support species. I have no idea if this has been suggested in the literature before, but I thought I would throw it out.

and speaking of this split, how many boreal species do we have left with ranges through both hemispheres of the holarctic? I have heard justification for splitting Pine Grosbeaks and Red Crossbills. Magpies, Three-toed Woodpeckers, etc have already been split. What about Bohemian Waxwings? Great Gray Owls? any others I'm missing?

 

F

fugl

Well-known member

• Apr 16, 2009

• #2

Also Northern/Great Gray Shrikes (if not already split?)?

 

Xenospiza

Distracted

• Apr 16, 2009

• #3

The three-way split Winter - Pacific - Eurasian Wren.
Maybe Northern Hawk Owl (American is much darker than European)?
The redpolls are in a state of flux I guess!

Somewhat different, but also interesting:
Atlantic - Pacific Black-legged Kittiwake
Atlantic - Pacific Common Murre/Guillemot
Atlantic - Pacific Northern Fulmar

 

Mysticete

Well-known member

• Apr 16, 2009

• #4

IIRC, Northern Fulmar was highlighted by barcode studies as a taxon that may represent two species (corresponding to Pacific and Atlantic populations)

And I don't think AOU (or BOU?) has recognized a Northern/Great Gray Shrike split

 

Microtus

Maryland USA (he/him)

• Apr 17, 2009

• #5

Mysticete said:

And I don't think AOU (or BOU?) has recognized a Northern/Great Gray Shrike split

Click to expand...

No, the AOU has not.

I wonder about (Northern) Goshawk...that's another forest species so there is (next to) no interchange between the two populations on either side of the Bering Strait.

 

Xenospiza

Distracted

• Apr 17, 2009

• #6

Microtus said:

No, the AOU has not.

I wonder about (Northern) Goshawk...that's another forest species so there is (next to) no interchange between the two populations on either side of the Bering Strait.

Click to expand...

Yup, those have been listed as a possibility too (and for a change, I've seen both taxa).

White-winged (leucoptera) and Two-barred Crossbill (bifasciata) are treated as separate species by the Dutch (as is the not very Boreal Hispaniola Crossbill (megaplaga)).

 

Gentoo

Guest

• Apr 17, 2009

• #7

What about Leach's Storm Petrel? Atlantic and Pacific?

 

Xenospiza

Distracted

• Apr 17, 2009

• #8

I guess the situation with Leach's might be even more complicated, with summer and winter breeders on Socorro a probable future split.

 

Richard Klim

-------------------------

• Apr 17, 2009

• #9

Xenospiza said:

White-winged (leucoptera) and Two-barred Crossbill (bifasciata) are treated as separate species by the Dutch (as is the not very Boreal Hispaniola Crossbill (megaplaga)).

Click to expand...

It's correct that Dutch Birding recognises Loxia megaplaga (as per IOC, BirdLife International, Cornell/Clements and AOU).

But DB does not (yet) treat bifasciata as a species.

Richard

 

jurek

Well-known member

• Apr 18, 2009

• #10

I remember old article about wole bunch of species around E Siberia/Alaska. They all differed by DNA on the order of subspecies, but visually were identical to subspecies.

On the other hand, Siberian Red Deer and American Elk are almost identical by DNA - and split goes between both and European Red Deer. So evidently forest animals can disperse pretty well.

 

Mysticete

Well-known member

• Apr 18, 2009

• #11

I recall that old article, which was posted somewhere here. Most of the birds in that list though were split as species, with only a few exceptions...

On a tangent, the Leach's Storm Petrel situation is also pretty complicated off of the Pacific, with two populations that are morphologically distinct (dark rump versus white rump) and breed at different times of the year on the same Baja/Socal islands. I have heard it argued that they probably represent different species, but I am not sure anyone has published or done the work yet. Certainly I would say their is a stronger case there then in some of the Atlantic islands, given the obvious morphological dissimiliarities

 

Jacana

Will Jones

• Apr 22, 2009

• #12

three more boreal species:

rough-legged buzzard/hawk
willow grouse/ptarmigan
(rock) ptarmigan

 

Gentoo

Guest

• May 25, 2009

• #13

How about:
Northern Harrier/Hen Harrier
Merlin
Hawk Owl