A Rare Look at salangensis Ashy Drongo

Editor’s note: Each spring and autumn, Ashy Drongo Dicrurus leucophaeus migrates through Shanghai. Race leucogenis breeds close to the Shanghai region and is the subspecies most commonly seen in Shanghai. The recent appearance at Nanhui of ssp. salangensis (pictured above) raises the question of exactly how numerous that central Chinese subspecies is on the Shanghai coast.

How dark was that migrating Ashy Drongo you just saw? You may want to pay attention, because the dark-grey central Chinese ssp. salangensis has been spotted at Nanhui, the coastal birding site in Shanghai. In this post, I lay out the identification criteria for salangensis and the paler, more common ssp. leucogenis. My theory is that salangensis appears at some higher rate in Shanghai than has historically been recorded, which until recently has been not at all. An opportunity to fine-tune our understanding awaits us!

SEPARATING THE SUBSPECIES

Ashy Drongo Dicrurus leucophaeus. All photos by Craig Brelsford except 3a (by Kai Pflug ).
Ashy Drongo Dicrurus leucophaeus. 1, 2b: D. l. leucogenis, Laoshan (32.071265, 118.560699), 4 July 2009. Laoshan, a site in Nanjing, Jiangsu 290 km inland from Shanghai, is a breeding area for D. l. leucogenis. 2a, 4: D. l. salangensis, Nanhui, Shanghai, 15 Oct. 2016. 3a: likely D. l. salangensis, Nanhui, September 2016. 3b: D. l. leucogenis, Dongzhai National Nature Reserve, Henan, 1 June 2010. All photos by Craig Brelsford except 3a (by Kai Pflug).

Ashy Drongo Dicrurus leucophaeus comprises 15 races, of which two are known in the Shanghai region: D. l. leucogenis and D. l. salangensis. D. l. leucogenis, the pale eastern race, is the more common migrant. D. l. salangensis is the darker race and is a vagrant to Shanghai.

A classic leucogenis (panels 1, 2b, 3b) is easy to distinguish from salangensis (2a, 4). A typical leucogenis is pale grey and shows a large white oval patch around the eye. D. l. salangensis is much darker, and its facial patch is reduced and less well defined. Both have a red iris.

Ashy Drongo not only has many races but also shows color variation within each race. The photos here were taken 1 June 2010 at Dongzhai, Henan. The drongo in Panel 1 is a classic pale leucogenis, and the drongo in panels 2 and 3 shows a slaty tone to the upperparts and underparts--though it too is most likely leucogenis.
Ashy Drongo not only has many races but also can show considerable color variation within each race. The drongos shown here were photographed within a few hundred meters of each other on 1 June 2010 at Dongzhai. The drongo in Panel 1 is a classic pale leucogenis. The drongo in panels 2 and 3 is a very different-looking bird, with a noticeable greyish-blue tone.

Intermediate forms (3a) are trickier. They may be purebreds showing random color variation or hybrids. The breeding ranges of leucogenis and salangensis partly overlap, with salangensis breeding in south-central China (mainly or exclusively south of the Yangtze River) and leucogenis breeding over a broad swath of eastern and central China from Sichuan east to Shandong and as far south as Guangdong.

Many thanks to Shanghai Birding member Jonathan Martinez. Martinez lives in Shenzhen and is an expert on the birds of southeast China. He was the first to point out that the photos of Ashy Drongo being posted on the Shanghai Birding WeChat group were of salangensis. He also was instrumental in our identification of the melanistic form of Long-tailed Shrike, discussed below. Thanks also to Paul Holt, who offered his opinion on the breeding range of leucogenis, and to Kai Pflug, for yet another useful photo.

103 SPECIES ON 15-16 OCT. 2016

Long-tailed Shrike dusky morph, Hengsha, 16 Oct. 2016.
Dusky Long-tailed Shrike, Hengsha, 16 Oct. 2016. Note that Dusky is not a subspecies but a color morph within Lanius schach schach, the same taxon found in Shanghai. The melanistic morph, however, is rare in Shanghai. Shanghai Birding member Jonathan Martinez reports that the form is ‘common’ in Guangdong, where the French birder resides. Martinez writes, ‘I’ve seen them in Jiangxi, Fujian, and coastal Guangxi. A bird turning up in Shanghai could be evidence of short-distance movements.’

Partnering with visiting U.S. birder Bryce Harrison, Elaine Du and I noted 103 species over the weekend of Sat. 15 Oct. and Sun. 16 Oct. 2016. We covered the three main birding areas in Shanghai: Nanhui, eastern Chongming Island, and the reclaimed areas of Hengsha Island.

At Nanhui on Saturday we found Nordmann’s Greenshank, 24 Black-faced Spoonbill, 4 Mandarin Duck, and the Ashy Drongo. On Sunday on Hengsha we found a dark-morph Long-tailed Shrike, rare in Shanghai.

Black-faced Spoonbill (L) and Eurasian Spoonbill, Nanhui, 15 Oct. 2016. In the Shanghai region, the two species often are found together.
Black-faced Spoonbill (L) and Eurasian Spoonbill, Nanhui, 15 Oct. 2016. In the Shanghai region, the two species often are found together. Though not under quite as much pressure as Nordmann’s Greenshank and Spoon-billed Sandpiper, Platalea minor is nonetheless listed by the IUCN as endangered. Throughout the winter, Black-faced Spoonbill are consistently seen at Nanhui.

Nanhui also gave us Japanese Quail, Purple Heron, 6 Eurasian Spoonbill, 6 Black-tailed Godwit, and a Eurasian Woodcock at the Magic GPS Point (30.880563, 121.964551). We must have stumbled blindly past the well-camouflaged woodcock half a dozen times before finally flushing it. Also 4 Japanese Paradise Flycatcher, 2 Asian Stubtail, 2 first-of-season Red-flanked Bluetail, 2 Japanese Thrush, and 3 Eyebrowed Thrush.

Hengsha yielded Striated Heron, Pied Harrier, Eastern Marsh Harrier, Hen Harrier, Merlin, 9 Black-browed Reed Warbler, and our season’s first taivana Eastern Yellow Wagtail.

Japanese Quail with ever-present backhoes in the background. Nanhui, 15 Oct. 2016.
Japanese Quail with ever-present backhoes in background. Nanhui, 15 Oct. 2016.

We found Eurasian Wryneck at Nanhui and on Hengsha and Bull-headed Shrike and Yellow-bellied Tit at Nanhui and on Chongming.

Nordmann’s Greenshank was roosting at nearly the same spot (30.920549, 121.963247) as a month ago. The endangered bird was among many Common Greenshank, allowing us to appreciate the former’s more obviously bi-colored bill, shorter legs, and more hunched appearance. The bird clearly stood out from among its Common cousins. For more on Nordmann’s ID, please see our Sept. 18 post, Your Handy-Dandy Nordmann’s Greenshank ID Primer.

The Black-faced Spoonbill were just a few hundred meters from the Nordmann’s in the defunct nature reserve. Poignantly, the spoonbills were roosting near the decrepit old sign introducing Platalea minor to the world.

UPDATES TO RECENT POSTS

This post has made waves among lovers of leaf warblers.This post has made waves among lovers of leaf warblers.
This post is making waves among leaf-warbler lovers.

My post of 26 Sept. 2016, “Pale-legged Leaf Warbler & the Shanghai Big 5,” has attracted the attention of Philip Round, one of the world’s foremost experts on Asian leaf warblers. I have written an addendum with an excerpt from an illuminating e-mail sent to me by Dr. Round. In it, he talks about the difficulties, some insurmountable, some not, in distinguishing Pale-legged Leaf Warbler from Sakhalin Leaf Warbler. In the republished post, scroll down to the section headed “UPDATE: 19 OCT. 2016.”

These photos are of a confirmed Amur female.
Amur female, Laoshan.

I have added two photos to the post of 10 Oct. 2016, “ID Workshop: Paradise Flycatchers.” The photos show a female Amur Paradise Flycatcher on its breeding grounds in Nanjing, Jiangsu. You now have another opportunity to study the photos of a confirmed Amur female. Compare that Amur with the migrating paradise flycatchers you find in the Shanghai area for an airtight ID. Scroll down to “UPDATE: 18 OCT. 2016.”

Day Lists
My first reference is IOC World Bird List.

List 1 of 1 for Fri. 14 Oct. 2016 (1 species). A line of trees at 31.216753, 121.408195. Point is near Zhongshan Park (31.221888, 121.420066) in Changning District, Shanghai, China. 12:35. Craig Brelsford.

Japanese White-eye Zosterops japonicus 8 (flock)

List 1 of 1 for Sat. 15 Oct. 2016 (75 species)

Bull-headed Shrike, Nanhui, 15 Oct. 2016.
Bull-headed Shrike Lanius bucephalus bucephalus, Nanhui. Outside the breeding season, the pale base to the lower mandible (inset) is present on both sexes of the nominate subspecies. This is an adult female. Note the lack of a black facial mask and the striking rusty-orange coloration. The nominate race breeds in northeast China, the Russian Far East and adjacent islands, Korea, and Japan and is a passage migrant in Shanghai. A little-known western subspecies, sicarius, breeds in Gansu and lacks the pale base to the lower mandible.

Birds noted around Pudong Nanhui Dongtan Wetland (Pǔdōng Nánhuì Dōngtān Shīdì [浦东南汇东滩湿地]; 30.920507, 121.973159), Pudong, Shanghai, China. Partly cloudy. Low 19° C, high 23° C. Humidity 73%. Visibility: 10 km. Wind E 23 km/h. PM2.5 AQI: 59 (moderate). Sunrise 05:58, sunset 17:21. SAT 15 OCT 2016 05:30-17:00. Craig Brelsford, Elaine Du, & Bryce Harrison.

Mandarin Duck Aix galericulata 4
Garganey Spatula querquedula 5
Eurasian Wigeon Mareca penelope 8
Eurasian Teal Anas crecca 60
Japanese Quail Coturnix japonica 1
Common Pheasant Phasianus colchicus 3
Little Grebe Tachybaptus ruficollis 80
Grey Heron Ardea cinerea 50
Purple Heron A. purpurea 1
Great Egret A. alba 15
Intermediate Egret A. intermedia 9
Little Egret Egretta garzetta 330
Chinese Pond Heron Ardeola bacchus 1
Black-crowned Night Heron Nycticorax nycticorax 32
Eurasian Spoonbill Platalea leucorodia 6
Black-faced Spoonbill P. minor 24
Western Osprey Pandion haliaetus 1
Eastern Marsh Harrier Circus spilonotus 1
Common Moorhen Gallinula chloropus 2
Eurasian Coot Fulica atra 30
Black-winged Stilt Himantopus himantopus 2
Grey Plover Pluvialis squatarola 21
Kentish Plover Charadrius alexandrinus 15
Black-tailed Godwit Limosa limosa 6
Red-necked Stint Calidris ruficollis 10
Dunlin C. alpina 20
Common Snipe Gallinago gallinago 2
Eurasian Woodcock Scolopax rusticola 1
Common Sandpiper Actitis hypoleucos 1
Spotted Redshank Tringa erythropus 16
Common Greenshank T. nebularia 80
Nordmann’s Greenshank T. guttifer 1
Wood Sandpiper T. glareola 1
Oriental Pratincole Glareola maldivarum 6
Gull-billed Tern Gelochelidon nilotica 6
Feral Pigeon (Rock Dove) Columba livia 1
Oriental Turtle Dove Streptopelia orientalis 7
Spotted Dove S. chinensis 10
Eurasian Wryneck Jynx torquilla 2
Falco sp. 1
Bull-headed Shrike Lanius bucephalus 4
Long-tailed Shrike L. schach 22
Black-naped Oriole Oriolus chinensis 3
Ashy Drongo Dicrurus leucophaeus salangensis 1
Japanese Paradise Flycatcher Terpsiphone atrocaudata 4
Barn Swallow Hirundo rustica ca. 200
Yellow-bellied Tit Periparus venustulus 3
Light-vented Bulbul Pycnonotus sinensis 16
Asian Stubtail Urosphena squameiceps 2
Pallas’s Leaf Warbler Phylloscopus proregulus 2
Arctic/Kamchatka Leaf/Japanese Leaf Warbler P. borealis/examinandus/xanthodryas 6
Pale-legged/Sakhalin Leaf Warbler P. tenellipes/borealoides 5
Plain Prinia Prinia inornata 6
Reed Parrotbill Paradoxornis heudei 5
Vinous-throated Parrotbill Sinosuthora webbiana 25
Dark-sided Flycatcher Muscicapa sibirica 1
Asian Brown Flycatcher M. dauurica 26
Blue-and-white Flycatcher Cyanoptila cyanomelana 10
Rufous-tailed Robin Larvivora sibilans 4
Red-flanked Bluetail Tarsiger cyanurus 2
Mugimaki Flycatcher Ficedula mugimaki 1
Taiga Flycatcher F. albicilla 1
Daurian Redstart Phoenicurus auroreus 5
White’s Thrush Zoothera aurea 12
Grey-backed Thrush Turdus hortulorum 2
Japanese Thrush T. cardis 2
Eyebrowed Thrush T. obscurus 3
White-cheeked Starling Spodiopsar cineraceus 10
Crested Myna Acridotheres cristatellus 3
White Wagtail Motacilla alba 7
Richard’s Pipit Anthus richardi 2
Olive-backed Pipit A. hodgsoni 2
Red-throated Pipit A. cervinus 2
Yellow-breasted Bunting Emberiza aureola 1
Black-faced Bunting E. spodocephala 1

List 1 of 2 for Sun. 16 Oct. 2016 (50 species)

Pied Harrier, Hengsha, 16 Oct. 2016.
Pied Harrier, Hengsha, 16 Oct. 2016. This is an adult female.

Birds noted on Hengsha Island (Héngshā Dǎo [横沙岛]), small alluvial island at mouth of Yangtze River in Shanghai, China. S gate to reclaimed area at 31.297333, 121.859434. Hazy, warm, humid. Low 19° C, high 27° C. Humidity 88%. Visibility: 10 km. Wind NNW 11 km/h. PM2.5 AQI: 179 (unhealthful). Sunrise 05:58, sunset 17:20. SUN 16 OCT 2016 05:45-10:15. Craig Brelsford, Elaine Du, & Bryce Harrison.

Eastern Spot-billed Duck Anas zonorhyncha 11
Little Grebe Tachybaptus ruficollis 20
Great Crested Grebe Podiceps cristatus 8
Great Cormorant Phalacrocorax carbo 1
Eurasian Bittern Botaurus stellaris 2
Grey Heron Ardea cinerea 30
Purple Heron A. purpurea 1
Great Egret A. alba 6
Intermediate Egret A. intermedia 3
Little Egret Egretta garzetta 100
Eastern Cattle Egret Bubulcus coromandus 6
Chinese Pond Heron Ardeola bacchus 1
Striated Heron Butorides striata 1
Black-crowned Night Heron Nycticorax nycticorax 75
Eastern Marsh Harrier Circus spilonotus 1
Hen Harrier C. cyaneus 1
Pied Harrier C. melanoleucos 1
Common Moorhen Gallinula chloropus 20
Eurasian Coot Fulica atra 20
Black-winged Stilt Himantopus himantopus 2
Kentish Plover Charadrius alexandrinus 180
Dunlin Calidris alpina 20
Common Snipe Gallinago gallinago 4
Common Greenshank Tringa nebularia 6
Wood Sandpiper T. glareola 3
Spotted Dove Streptopelia chinensis 2
Common Kingfisher Alcedo atthis 3
Eurasian Wryneck Jynx torquilla 1
Common Kestrel Falco tinnunculus 2
Merlin F. columbarius 1
Falco sp. 1
Long-tailed Shrike Lanius schach 13 (including 1 dusky morph)
Eurasian/Oriental Skylark Alauda arvensis/gulgula 10
Barn Swallow Hirundo rustica 50
Red-rumped Swallow Cecropis daurica 2
Light-vented Bulbul Pycnonotus sinensis 12
Black-browed Reed Warbler Acrocephalus bistrigiceps 9
Zitting Cisticola Cisticola juncidis 7
Plain Prinia Prinia inornata 16
Reed Parrotbill Paradoxornis heudei 3
White-cheeked Starling Spodiopsar cineraceus 6
Crested Myna Acridotheres cristatellus 3
Stejneger’s Stonechat Saxicola stejnegeri 1
Eurasian Tree Sparrow Passer montanus 10
Eastern Yellow Wagtail Motacilla tschutschensis 6 (4 taivana, 2 tschutschensis)
White Wagtail M. alba 10
Richard’s Pipit Anthus richardi 12
Olive-backed Pipit A. hodgsoni 1
Red-throated Pipit A. cervinus 1
Yellow-breasted Bunting Emberiza aureola 1
Black-faced Bunting E. spodocephala 2

List 2 of 2 for Sun. 16 Oct. 2016 (47 species)

Eurasian Hobby eating on the wing, Chongming Island, 16 Oct. 2016.
Juvenile Eurasian Hobby dining on the wing, Chongming Island, 16 Oct. 2016.

Around Chongming Dongtan National Bird Sanctuary and Nature Reserve (Chóngmíng Dōngtān Niǎolèi Guójiājí Zìrán Bǎohùqū [崇明东滩鸟类国家级自然保护区]), Chongming District, Chongming Island, Shanghai, China (31.510109, 121.961955). Hazy, warm, humid. Low 19° C, high 27° C. Humidity 88%. Visibility: 10 km. Wind NNW 11 km/h. PM2.5 AQI: 179 (unhealthful). Sunrise 05:58, sunset 17:20. SUN 16 OCT 2016 11:45-16:25. Craig Brelsford, Elaine Du, & Bryce Harrison.

Eurasian Wigeon Mareca penelope 30
Eastern Spot-billed Duck A. zonorhyncha 6
Common Pheasant Phasianus colchicus 1
Little Grebe Tachybaptus ruficollis 50
Grey Heron Ardea cinerea 15
Great Egret A. alba 10
Intermediate Egret A. intermedia 4
Little Egret Egretta garzetta 50
Eastern Cattle Egret Bubulcus coromandus 12
Black-crowned Night Heron Nycticorax nycticorax 5
Hen Harrier Circus cyaneus 2
Common Moorhen Gallinula chloropus 5
Eurasian Coot Fulica atra 60
Grey-headed Lapwing Vanellus cinereus 2
Kentish Plover Charadrius alexandrinus 2
Whimbrel Numenius phaeopus 1
Far Eastern Curlew N. madagascariensis 8
Eurasian Curlew N. arquata 2
Common Snipe Gallinago gallinago 2
Common Sandpiper Actitis hypoleucos 2
Spotted Redshank Tringa erythropus 10
Common Greenshank T. nebularia 4
Marsh Sandpiper T. stagnatilis 25
Wood Sandpiper T. glareola 7
Oriental Pratincole Glareola maldivarum 50
Vega Gull Larus vegae vegae/L. v. mongolicus 1
Common Tern Sterna hirundo 3
Spotted Dove Streptopelia chinensis 8
Eurasian Hobby Falco subbuteo 1
Peregrine Falcon F. peregrinus 1
Falco sp. 1
Bull-headed Shrike Lanius bucephalus 1
Long-tailed Shrike L. schach 16
Black-naped Oriole Oriolus chinensis 1
Eurasian Magpie Pica pica 18
Barn Swallow Hirundo rustica 50
Yellow-bellied Tit Periparus venustulus 1
Light-vented Bulbul Pycnonotus sinensis 20
Reed Parrotbill Paradoxornis heudei 1
Vinous-throated Parrotbill Sinosuthora webbiana 30
Crested Myna Acridotheres cristatellus 7
Asian Brown Flycatcher Muscicapa dauurica 3
Eurasian Tree Sparrow Passer montanus 50
Eastern Yellow Wagtail Motacilla tschutschensis 8 tschutschensis
White Wagtail M. alba 5
Richard’s Pipit Anthus richardi 12
Olive-backed Pipit A. hodgsoni 2
Red-throated Pipit A. cervinus 4

List 1 of 1 for Mon. 17 Oct. 2016 (2 species)

This line of trees wedged between two housing complexes holds many wild birds. On 17 Oct. 2016, I found Oriental Magpie-Robin and Japanese Tit, and on 14 Oct. I found a flock of Japanese White-eye.
This line of trees (31.216753, 121.408195) is wedged between two housing complexes near my apartment in Changning District, Shanghai. Deep in the bowels of Earth’s largest city, this spot is as urban as urban can be. The trees, however, are tall and provide a large surface area for wild birds. On 17 Oct. 2016, I found Oriental Magpie-Robin and Japanese Tit there, and on 14 Oct. I found a fast-moving flock of Japanese White-eye. Chinese Blackbird breed in the area, and Siberian Weasel have been noted in the vicinity.

A line of trees at 31.216753, 121.408195. Point is near Zhongshan Park (31.221888, 121.420066) in Changning District, Shanghai, China. Mostly clear. Low 18° C, high 23° C. Humidity 80%. Visibility 10 km. Wind NE 11 km/h. PM2.5 AQI: 107 (unhealthful). Sunrise 05:59, sunset 17:19. MON 17 OCT 2016 08:35, 12:35. Craig Brelsford.

Japanese Tit Parus minor 2
Oriental Magpie-Robin Copsychus saularis 1

WORKS CONSULTED

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Brelsford, Craig, moderator. Shanghai Birding, a WeChat chat group. Quotations from Jonathan Martinez and Paul Holt taken from this chat group. To join Shanghai Birding, fill out the form on our Sightings page.

Brazil, Mark. Birds of East Asia. Princeton University Press. Entry on Ashy Drongo, p. 300. Brazil’s opus grows weaker as the distance from Japan (his base) of the birds he is covering grows longer. Brazil offers no information on D. l. salangensis on the east coast of China.

del Hoyo, Josep, et al., eds. The Handbook of the Birds of the World. Lynx Edicions. Vol. 14, “Bush-shrikes to Old World Sparrows.” Entry for Ashy Drongo (p. 220) written by G.J. Rocamora and D. Yeatman-Berthelot. The authors have “N Gansu” as the northwestern limit of the breeding range of D. l. leucogenis. Is that likely? See also Paul Holt’s misgivings in MacKinnon, John & Karen Phillipps, below.

del Hoyo, Josep, et al., eds. The Handbook of the Birds of the World. Lynx Edicions. Vol. 13, “Penduline-tits to Shrikes.” Entry for Bull-headed Shrike (pp. 775-6) written by Masaoki Takagi. Long-tailed Shrike (p. 781) by Anton Krištín.

Ferguson-Lees, James & David A. Christie. Raptors of the World. Princeton Field Guides. Entries on Pied Harrier, Hen Harrier, and Eastern Marsh Harrier.

MacKinnon, John & Karen Phillipps. A Field Guide to the Birds of China. Oxford University Press. Entry on Ashy Drongo, pp. 281-2. MacKinnon has breeding range of D. l. leucogenis stretching to Heilongjiang. Paul Holt (Shanghai Birding WeChat group) disagrees, saying the northeastern limit is more likely Shandong. Holt writes: “I think that the weakest aspect of John MacKinnon’s ground-breaking field guide are the ranges, and again I don’t think HBW’s accurate on that front either. I’d discount Heilongjiang, Jilin, Liaoning, and Hebei from the breeding range of leucogenis Ashy Drongo and don’t believe that it can breed further north than Shandong (where it might not even occur) and southernmost Shanxi.”

Robson, Craig. Birds of Southeast Asia. Princeton University Press. Ashy Drongo, p. 176.