Michael Frankis
conehead
Hi Gerry,Gerry Hooper said:
They're noisy when perched, but generally silent in flight . . . stranger yet!
Michael
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Wader's wing bars (2 Viewers)
- Thread starter Gerry Hooper
- Start date
They're noisy when perched, but generally silent in flight . . . stranger yet!
Michael
Hi Michael,
'Actually, come to think of it, most of the flocking finches have wingbars - it seems to be mainly solitary species that don't go in for wingbars much'
On the subject of wingbars,it's a little strange that these are shown by quite a few eastern Phylloscopus warblers,not all of which necessarily have a common ancestor(Yellow-browed,Hume's,Pallas's,Arctic,Greenish,Eastern and Western Crowned,and even some tristis Chiffs,and probably more?),while the species that breed in western Europe lack them.
I concede,however,that Asia is obviously the ancestral home of the genus(far higher species diversity there),and very few breed in Western Europe,and may derive from a limited genepool of colonists?
Harry H
'Actually, come to think of it, most of the flocking finches have wingbars - it seems to be mainly solitary species that don't go in for wingbars much'
On the subject of wingbars,it's a little strange that these are shown by quite a few eastern Phylloscopus warblers,not all of which necessarily have a common ancestor(Yellow-browed,Hume's,Pallas's,Arctic,Greenish,Eastern and Western Crowned,and even some tristis Chiffs,and probably more?),while the species that breed in western Europe lack them.
I concede,however,that Asia is obviously the ancestral home of the genus(far higher species diversity there),and very few breed in Western Europe,and may derive from a limited genepool of colonists?
Harry H
Michael Frankis
conehead
Hi Harry,
I think your last bit has it - Asia is where they're from, and has the greatest diversity. There's wingbarless Radde's and Dusky ** and several others over there as well . . .
(** these two seem to be to some extent ecological counterparts of Sylvia warblers, which are a west Pal group that don't occur in east Asia)
Michael
I think your last bit has it - Asia is where they're from, and has the greatest diversity. There's wingbarless Radde's and Dusky ** and several others over there as well . . .
(** these two seem to be to some extent ecological counterparts of Sylvia warblers, which are a west Pal group that don't occur in east Asia)
Michael
Hi Michael,
I agree,and note that I said that wingbars are shown by 'quite a few' species,not all!Fully aware that Radde's and Dusky lack them.
While I haven't seen Dusky(though I'm well aware of its habits),I can certainly see what you mean by Radde's being almost an ecological counterpart of the Sylvia warblers: it hardly flits about like a typical Phylloscopus....
What about Lesser Whitethroat?
Harry H
Michael Frankis said:
I agree,and note that I said that wingbars are shown by 'quite a few' species,not all!Fully aware that Radde's and Dusky lack them.
While I haven't seen Dusky(though I'm well aware of its habits),I can certainly see what you mean by Radde's being almost an ecological counterpart of the Sylvia warblers: it hardly flits about like a typical Phylloscopus....
What about Lesser Whitethroat?
Harry H
Michael Frankis
conehead
Hi Harry,
Guess the significant barrier is summer rainfall - LW gets as far east as warm, dry summer conditions extend, but not into the ocean-influenced summer monsoon areas that define 'east Asia'.
Michael
Could say that's a bit like Greenish Warbler in the other direction - it gets a long way east in central Asia, but not really into 'true' east Asia, it doesn't breed anywhere within 1300-1400 km of the Pacific, just like Greenish doesn't breed anywhere within about the same distance of the Atlantic.Harry Hussey said:What about Lesser Whitethroat?
Guess the significant barrier is summer rainfall - LW gets as far east as warm, dry summer conditions extend, but not into the ocean-influenced summer monsoon areas that define 'east Asia'.
Michael
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