Shrikes, aka butcher birds are always pleasing to see. Recent molecular studies have forced (yet another) rethink about what used to be called ‘Great Grey Shrikes’ and how they might be related to one another. A division between ‘Northern’ and ‘Southern’ forms is already well-known. Here’s a look at the Southern Grey Shrikes where there is much more to discovered about identification, genetics, vocalisations and interbreeding of forms. A birding frontier! Furthermore an ‘Asian Grey Shrike’ in Norfolk in 1982 considered to be an escape might be worth revisiting.
A paper published in 2010 (see end) suggested different possible (new) taxonomic treatments, with an option being to treat the southern birds as 3 separate species. This position has been adopted by e.g. Dutch Birding:
Desert Grey Shrike Lanius elegans with taxa: elegans, koenigi and algeriensis
Iberian Grey Shrike Lanius meridionalis
Asian Grey Shrike Lanius lahtora with taxa: lahtora, pallidirostris and aucheri
What’s confusing is that birds with the most similar plumages and in some case breeding closest to one another, are not necessarily the most closely related. So takes some getting your head around! Expressed simply a broad sweep from the Canaries to India reveals most of the southern taxa are dark smoky-grey looking shrikes. From koenigi in the Canaries, algeriensis of coastal North Africa, aucheri of the Middle East through to lahtora in India all look broadly very similar. Into that mix the Iberian meridionalis is similarly dark, often with pinkish caste to underparts. The outstandingly paler form is elegans spanning right across inland North Africa through to the Middle East while the different looking pallidirostris sits perched in the NE corner (Central Asia) of this range.
Desert Grey Shrike form ‘koenigi’, Lanzarote, Sept 2013. Martin Garner. This insular form is resident on the Canary Islands and is a dark grey above merging with deep extensive grey tones below with contrastingly white throat. Limited white in wing and large black mask with hardly any/ no white supercilium. The Iberian form meridonialis is viewed as a separate species ‘Iberian Grey Shrike’ by both Dutch Birding and the 2nd ed. Collins Guide.
Desert Grey Shrike ‘koenigi’, Lanzarote, Sept 2013. Martin Garner. Pattern of white in wing and tail provide key information when identifying all the grey shrikes.
first winter Desert Grey Shrike, Linosa (Italy), November 2011. Igor Maiorano. From nearby North Africa. Extensive white in the wing, with large white primarv patch and white outer webs in secondaries points to the paler elegans. Some aspects thought to indicate it fit ‘dodsoni‘ , usually viewed as intergrade form between darker plumaged, more coastal algeriensis and paler more inland form, elegans. Thankfully these are considered the same species in the new taxonomy! Bit more here
first winter Desert Grey Shrike, form elegans/ dodsoni, Linosa (Italy), November 2011. Ottavio Janni. Same bird as above, now in flight showing extensive white in wing
Adult Desert Grey Shrike, form elegans, Negev, Israel, November 2012, Martin Garner. Paler grey above than co-occuring aucheri (Asian Grey Shrike) in Israel. Also with lots white in wing; large white primary patch and ‘linking’ white on secondary edges with bright white underparts, something of white supercilium with limited black on forehead/over top of bill base.
2 photos above: First winter Asian Grey Shrike, form aucheri, Hula, Israel Nov 2012. Martin Garner. You get 2 species to tick now in Israel! the dark aucheri is lumped as Asian Grey Shrike with ‘lahtora’ from further east and includes central Asian subspecies pallidirostris, while elegans is a Desert Grey Shrike. The more common form in N Israel is aucheri with darker grey upperparts, more extensive and darker grey in underparts,more black in mask and less white in wing than elegans (e.g. see above).
Asian Grey Shrike, form aucheri, Hula, Israel Nov 2012. Martin Garner. White in wing essentially limited to primaries. Such a dark bird with limited white seems to fit more extreme end of aucheri, perhaps an example of taxon ‘theresae’ upheld by some authors
Adult Asian Grey Shrike, form aucheri, Beit She’an Valley, Israel Nov 2013, Martin Garner. An interesting bird, Extensive black mask but wasn’t especially darker above and with more white in wing than other easy ‘aucheri’…
Adult Asian Grey Shrike, Roger Tidman. A remarkable record from Norfolk! Found at Toftwood, (nr. Dereham) from August 23rd 1982 it was later found dead there ‘at the end of the year’. The specimen was apparently identified by the BTO and Tring as ‘of the Indian race’ lahtora. It was considered an escape at the time due to its tameness and residence in a built-up area. Characters pointing to lahtora include extensive black mask, darker grey upperparts but whiter underparts and more white in wing than e.g. aucheri. Intriguingly it’s appearance is not much different to the bird above photographed in Beit She’an Valley, Israel. This bird seems worthy of further investigation. It seems an unlikely vagrant whether aucheri or lahtora, though stranger things have happened. How many ‘Asian Grey Shrikes’ were kept in captivity in Western Europe in the early 1980′s? Isotope analysis of feathers from the specimen could be revealing. This photo © Roger Tidman not to be reproduced in any form.
Download the key paper which is bringing new taxonomic thinking:
Grateful thanks to Roger Tidman, James McCallum, Chris Kehoe, Andy Stoddart, the MISC, Dani López-Velasco, Juan Sagardia and Yoav Perlman.