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Jerdon's Babbler (1 Viewer)

Richard Klim said:
I think that was Daniel's point – C a scindicum ('Sind Babbler') is endemic to Pakistan, but C altirostre (as stated in the title) isn't.
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Actually not, C a scindicum ('Sind Babbler') is the ssp you see in NE India (Punjab). Although it just occurs in one site in India, it's not endemic to Pakistan.
 
Markus Lagerqvist said:
Actually not, C a scindicum ('Sind Babbler') is the ssp you see in NE India (Punjab). Although it just occurs in one site in India, it's not endemic to Pakistan.
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OK, Markus. Sorry, I misunderstood you – but presumably you mean NW India.

[C a griseigulare occurs in NE India.]
 
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Markus Lagerqvist said:
Actually not, C a scindicum ('Sind Babbler') is the ssp you see in NE India (Punjab). Although it just occurs in one site in India, it's not endemic to Pakistan.
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This is interesting as the authors of this paper do not seem to know about it:
There were the record of its population from the east (Ali and Ripley, 1987) but few recently published records also support this (Collar et al., 2001), for which detailed taxonomic studies are required if same subspecies exists in the Indian territory?
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, based on Collar et al. 2001:
The subspecies C. a. scindicum is confined to the Indus river and its tributaries (Harrington 1914-1915, Roberts 1991-1992). Historically, it probably occupied suitable habitat all along the Indus, but it now occurs as three (or four) separate subpopulations (Roberts 1991-1992, Showler and Davidson 1999): (1) south-east Sind (Sanghar and Thar Parkar districts) along the Eastern Narra (Eates 1940-1950); (2) northern and central Sind, from around Sukkur southward to Nawabshah, and (3) south-west Punjab northward to southern North-West Frontier Province (Waite 1933). Recent records from Dera Ismail Khan district (Kylänpäa 1997, Showler and Davidson 1999) represent range extensions on the Indus floodplain. It appears that suitable habitat currently exists along the Indus between Taunsa and Chasma (Showler and Davidson 1999).
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James Eaton said:
You might hear some news on this shortly ;-)

J
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From Frank Rheindt w permission:

"Hi Frank,
Can't open attachment as I am in the field in Myanmar, where Rob Tizard and I just rediscovered and obtained DNA for Chrysomma altirostre altirostre, which had gone missing for 73 years. Looks distinct and sounds fairly distinct, although you never know with those oscines..."
 
Frank Gill said:
From Frank Rheindt w permission:
"Hi Frank,
Can't open attachment as I am in the field in Myanmar, where Rob Tizard and I just rediscovered and obtained DNA for Chrysomma altirostre altirostre, which had gone missing for 73 years. Looks distinct and sounds fairly distinct, although you never know with those oscines..."
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Frankly, good news from Frank (via Frank)! ;)
 
Sadanandan, K.R., Olsson, U., Tizard, R. et al. Genetic and biometric variation across the fragmented range of Jerdon’s Babbler, Chrysomma altirostre, a threatened Oriental grassland specialist. J Ornithol (2018). https://doi.org/10.1007/s10336-018-1530-7

Abstract:

Jerdon’s Babbler Chrysomma altirostre is a threatened Oriental grassland specialist passerine heavily affected by habitat loss. Its now-relictual range spans from Pakistan to Myanmar covering three poorly-studied subspecies. Our study of subspecific differentiation revealed limited range-wide mitochondrial divergences, suggesting that mountain ranges and other geographic barriers may not have been insurmountable obstacles to inter-subspecific Pleistocene connectivity of this highly specialized grassland bird. For the westernmost subspecies scindicum, we report on phenotypic differentiation consistent with Gloger’s Rule, and ecomorphological adaptations to arid environments requiring increased mobility.
 
So, as a lay person reading this, to be split East-West or not, seems to make points for both, report inconclusive??


A
 
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andyadcock said:
So, as a lay person reading this, to be split East-West or not, seems to make points for both, report inconclusive??


A
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No support for a split. I imagine this work was done to investigate what was going on with the Myanmar population. As it is, the species shows limited differentiation across the range, probably because the distribution seen today is relictual.
 
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