Grahame Walbridge
Well-known member
21-22 both are Plain Prinias ssp. herberti, 2nd image appears longer-tailed due to missing (moulting?) upper tail coverts.
Brown Prinia has a thinner, much less distinct supercilium, streaked upperparts and more saturated underparts. Also note the taxon of Brown that occurs in S,C Annam is a very likely future split, Annam Prinia Prinia rocki following Alsrtrom et al 2019 https://www.shanghaibirding.com/wp-content/uploads/2019/10/Alstrom-et-al.-2019-Prinia-crinigera-polychroa-Ibis.pdf see image p13 (d) for comparison.
IOC proposal splits https://www.worldbirdnames.org/updates/proposed-splits/[/URL
Grahame
Brown Prinia has a thinner, much less distinct supercilium, streaked upperparts and more saturated underparts. Also note the taxon of Brown that occurs in S,C Annam is a very likely future split, Annam Prinia Prinia rocki following Alsrtrom et al 2019 https://www.shanghaibirding.com/wp-content/uploads/2019/10/Alstrom-et-al.-2019-Prinia-crinigera-polychroa-Ibis.pdf see image p13 (d) for comparison.
IOC proposal splits https://www.worldbirdnames.org/updates/proposed-splits/[/URL
Grahame
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