’Tis the season of the stubtail in Shanghai. Every year in April and May, and again in September and October, birders in Earth’s Greatest City record Asian StubtailUrosphena squameiceps. Migrant stubtails are no strangers to the inner city; the photo above, for example, was taken at Changfeng Park, deep in Shanghai’s urban jungle.
In Shanghai, most of my records of Asian Stubtail have come from the microforests that dot the sea wall at Cape Nanhui. Migrating stubtails can, however, turn up in any wooded area. In his apartment complex recently, in a wood of about 25 square meters, Shanghai birder Komatsu Yasuhiko found Asian Stubtail. Hiko’s find bears out Kennerley and Pearson: Migrating Asian Stubtail, they write, is “opportunistic and likely to utilise any area of coastal or inland woodland or scrub offering shade and undisturbed areas for feeding” (2010, 557).
If Asian Stubtail is seen clearly or photographed well, then one can readily appreciate its distinctiveness. No other warbler in our region has its large-headed, bull-necked, stubby-tailed structure. The long, creamy supercilium is prominent, as is the contrastingly dark eye-line. The bill is fine and pointed, the legs are long and conspicuously pale, and the crown shows faint scaling.
Once on Lesser Yangshan, the island hotspot off the coast of Shanghai, I mistook Radde’s WarblerPhylloscopus schwarzi for a stubtail. A closer look at my photos revealed the longer tail and spikier bill of the Radde’s. Dusky WarblerP. fuscatus shares the dull, uniform plumage of Asian Stubtail and like the stubtail has a long supercilium, but it has a longer tail and shorter bill. Observers of Asian Stubtail in its winter range must separate it from shortwings and wren-babblers, while viewers of the species in its breeding range need to distinguish it from Eurasian WrenTroglodytes troglodytes (Kennerley & Pearson 2010, 556).
A common passage migrant in Shanghai, Asian Stubtail breeds in Beijing, Hebei, and Northeast China and adjacent Ussuriland as well as southern Sakhalin Island, the four main islands of Japan, and the Korean Peninsula. The winter range includes Guangdong, Hainan, and Guangxi and much of Southeast Asia (Holt in litt., 2019; Brazil 2009, 340; Kennerley & Pearson 2010, 557).
I have noted breeding Asian Stubtail in Heilongjiang and Hebei (10 June), migrating Asian Stubtail in Jiangsu and Shanghai, and a possibly wintering Asian Stubtail on 15 Nov. 2014 at Wuyuan, Jiangxi. Regarding the Jiangxi record, the presence of the species in mid-November at that latitude (29.2142, 117.5626) is surprising but not inconceivable; Brazil (2018, 290) reports that some Asian Stubtail winter in southern Kyushu, which is farther north than Jiangxi. The Wuyuan stubtail was singing intermittently; the best explanation may be that it was a first-winter bird.
Asian Stubtail, “sit” call and short song, Wuyuan, Jiangxi, 15 Nov. 2014 (16 MB; 01:37)
Clement, P. (2006). Family Sylviidae (Old World Warblers). P. 588 (Asian Stubtail) in del Hoyo, J., Elliott, A. & Christie, D.A. eds. (2006). Handbook of the Birds of the World. Vol. 11. Old World Flycatchers to Old World Warblers. Lynx Edicions, Barcelona, Spain.
Holt, P. (2019). Series of text messages between Holt and author, 20 April.
Kennerley, P. & Pearson, D. (2010). Reed and Bush Warblers. London: Christopher Helm.
1. On 22 April 2019, Beijing added to breeding range of Asian Stubtail, Paul Holt added to bibliography.
Featured image: Asian StubtailUrosphena squameiceps, Changfeng Park, Shanghai, May. (Craig Brelsford)
Five years ago, from September through December 2012, Varied Tit burst into Earth’s Greatest City. For those few months, the status of Sittiparus varius varius in Shanghai went from “unrecorded” to “locally common.” I noted Varied Tit on various occasions on Lesser Yangshan Island and in urban Shanghai at Zhongshan Park, Changfeng Park, and Binjiang Forest Park.
The mass movement saw incursions of Varied Tit up and down the Chinese coast, with reports from as far south as Hong Kong. Unusually high numbers of Varied Tit were reported in South Korea as well as Japan (Loghry & Moores 2012).
The episode captured many birders’ imaginations, not only because of its ornithological interest, but also because Varied Tit is a beautiful bird.
Five years later, the 2012 irruption remains remarkable. Despite the growing number of birders in the Shanghai region, no one here has managed to find Varied Tit, a species not especially prone to irruptions.
Harrap and Quinn describe Varied Tit as resident throughout its range, with “some evidence,” some of which is “contradictory,” of movements south and to lower altitudes in winter. The word “irruption” does not appear in the authors’ otherwise exhaustive account of Varied Tit (1995).
In China, the nominate form of Varied Tit is confined to Northeast China (Liaoning and southern Jilin). It is resident as well on the adjacent Korean Peninsula and the main Japanese islands.
In 2012 as now, I was using my Nikon D3S and 600 mm F/4 lens. Here are some of the photos I produced of Varied Tit.
Harrap, Simon & Quinn, David. Chickadees, Tits, Nuthatches and Treecreepers. Princeton University Press, 1995. Varied Tit, pp. 70-1, 397-401.
Featured image: In autumn and winter 2012, Shanghai experienced an irruption of Varied TitSittiparus varius varius. Top 2, from L: Lesser Yangshan Island, Zhejiang, 5 Dec. 2012 and Changfeng Park, Shanghai, 17 Nov. 2012. Bottom 2: Lesser Yangshan, 30 Sept. 2012. (Craig Brelsford)
Does Green-backed FlycatcherFicedula elisae migrate through Shanghai? Records exist of the species, but in my opinion they are mainly misidentifications of female Narcissus FlycatcherF. narcissina narcissina (above). In this post, I am going to unearth the roots of my skepticism about F. elisae in Shanghai and describe the differences between female F. elisae and female F. n. narcissina.
Each spring and autumn, birders in Earth’s Greatest City claim records of elisae. Invariably, the bird in question is a female, not the very distinctive adult male. Here our first red flag pops up: How likely is it that elisae is the one species of passerine whose records in Shanghai never involve adult males?
For the sake of argument, let us admit the possibility of an all-female migration of elisae through Shanghai. Fine, I retort; then show me photos of these purported elisae. The photos are duly supplied, and again and again, as has been the case throughout my more than 10 years in Shanghai, the supposed F. elisae is revealed on closer scrutiny to be yet another female F. n. narcissina.
Indeed, I have seen better documentation in Shanghai of Ryukyu FlycatcherF. (narcissina) owstoni than of F. elisae; on 17 April 2016 at Pudong’s Binjiang Forest Park, Shanghai birder Zhang Xiaolei got a very interesting picture of a possible adult-male owstoni.
Mistakes of the sort many Shanghai birders are making contribute to a distorted picture of the presence on the central Chinese coast of a little-known species. What’s more, the mistakes are avoidable. Separation of female F. elisae and F. n. narcissina is usually straightforward.
Female F. elisae has greenish upperparts with a yellowish or olive tint. Female F. n. narcissina is greenish with a brownish tint, like female Blue-and-white FlycatcherCyanoptila cyanomelana (above). On their underparts, female F. elisae is “dull yellow or yellowish-buff,” while F. n. narcissina is mainly off-white, with brownish-white flanks and a hint of yellow on the throat and belly (Brazil 2009, 436).
Accurate records in Shanghai, one of the most thoroughly birded areas on the Chinese coast, will lead to better understandings of both F. elisae and F. n. narcissina. Already, the growing body of knowledge about these East Asian breeding endemics has led to the separation of F. elisae and F. n. narcissina into separate species. Previously, elisae had been treated as a subspecies of Narcissus Flycatcher.
We know as well that the summer and winter ranges of the sister species are disjunct, with F. elisae breeding in a very compact range in Hebei (Wulingshan), Beijing, and Shanxi and wintering in southern Thailand and Peninsular Malaysia. The breeding range of F. n. narcissina includes the main islands of Japan as well as the Kuril Islands, Sakhalin, and the coastal Russian Far East. The species winters in Hainan, the Philippines, and Borneo and passes through Shanghai each spring from about 15 April to 15 May.
Unlike other passage-migrant flycatchers in Shanghai, F. n. narcissina is much less common in autumn than in spring. That is a mystery, one of many surrounding the migration of the Narcissus Flycatcher group.
In light of the information deficit, it behooves us Shanghai birders to strive for accurate records (or non-records) of elisae in our region. Let us practice self-discipline, hone our skills, and give outside observers the clearest possible picture of bird migration in Shanghai.
Brazil, Mark. 2009. Birds of East Asia. Princeton, New Jersey: Princeton University Press. Entries for Narcissus Flycatcher and Chinese Flycatcher (Ficedula elisae), p. 436.
Gill, F & D Donsker (Eds). 2019. IOC World Bird List (v 7.3). shanghaibirding.com’s first reference for taxonomy as well as bird names in English. Accessed 23 April 2019.
The new entries on the shanghaibirding.com list are Sakhalin Leaf Warbler, Dusky Warbler, and White-throated Rock Thrush. The new entries on the eBird list are those three plus Japanese Paradise Flycatcher and Taiga Flycatcher.
“Century Park is getting better,” Hiko said. My young friend is right. Century Park is an island of stability amid the sea of change (mainly degradation) that is the natural environment of Shanghai. Ten years ago this month, when Hiko was a tyke of 6, I made my first visit to urban Shanghai’s best birding area. Little has changed. The biggest difference between October 2007 and October 2017 is, the trees are taller. The wooded areas at Century have an ever-stronger woodsy feel.
— Century yielded yet another regional record of Sakhalin Leaf Warbler. Evidence is growing that in the Shanghai area this passage migrant has been neglected and is more common than previously thought. I recently wrote a series of posts, the latest being this one, on distinguishing Sakhalin Leaf Warbler from its sister species Pale-legged Leaf Warbler.
Here is the recording I made of the calling Sakhalin on Thurs. 5 Oct. Apart from a DNA assay, call as well as song is the only reliable way to separate Sakhalin Leaf Warbler from Pale-legged Leaf Warbler. At 4.9 kHz, the “tink” recorded below is a full kilohertz deeper than the call of Pale-legged Leaf Warbler.
— Eurasian Woodcock whizzed overhead on its way to Bird Island (31.217405, 121.554936). The woodcock was going to the one best place for it in the urban park. Bird Island, Century’s sanctuary-within-a-sanctuary, is a bird-friendly, cat-free parcel of woodland cut off from the rest of the park by a moat.
— Great Spotted Woodpecker used to be found mainly on Bird Island. On Thursday we found 2 in other sectors of the park. With the steadily improving woodland in the park, expect Great Spotted Woodpecker to be seen in more and more areas. Century Park is one of the few areas in urban Shanghai where woodpeckers are commonly found.
On Sun. 17 Sept. 2017 at Pudong’s Cape Nanhui, I achieved a personal first: photos of an unmistakable Sakhalin Leaf WarblerPhylloscopus borealoides. As expected, the photos show a leaf warbler whose plumage and bare parts are virtually indistinguishable from those of Pale-legged Leaf Warbler P. tenellipes. Coupled, however, as they are with sound-recordings of the same individual, ensuring the ID, the photos constitute a rare visual record of Sakhalin Leaf Warbler in Shanghai.
The leaf warbler I found was easily identifiable as a member of the Pale-Sak species pair. It had strikingly pale pink tarsi, an olive-brown crown contrasting with olive-green mantle and wings, a long and creamy supercilium, and faint wing bars on the median and greater coverts.
The bird, which was in Microforest 1, behaved in a way typical of the Pale-Saks I have observed in the Cape Nanhui microforests, eight tiny woodlands that dot the coastline of the cape. Rarely venturing more than 2 m off the ground, the leaf warbler favored low branches and vines for browsing and sturdy low branches for perching. It pumped its tail steadily, called spontaneously, and upon hearing playback of its own call moved in to investigate the source.
Without recording the call of the leaf warbler (call as well as song being a diagnostic separator of Sakhalin and Pale-legged), would I have been able to get an ID? Almost certainly not, said leaf-warbler expert Phil Round:
“I am a bit less sanguine on finding means (other than call frequency or song) to separate all [Pale-Saks]. Even in the hand, it is by no means clear. We can pick out long-winged male Sakhalin, and short-winged female Pale-legged. But there is more overlap than previously realized, and most are in between. There don’t appear to be any 100% consistent wing-formula differences, and plumage and bare-part features, while somewhat indicative, are again less than 100% reliable–especially under field conditions.” (Round, in litt., 2016; emphasis mine)
The most convenient separator of Pale-Sak is song, the cricket-like trill of Pale-legged being easily separable from the metallic whistle of Sakhalin. As Shanghai is not in the breeding range of either species, Pale-Sak songs are not often heard in Earth’s Greatest City. I have heard Sakhalin sing only once, on 5 May 2016 at Shanghai’s Zhongshan Park (Brelsford 2016). The song of Pale-legged I have heard at various locations in Shanghai as well as on its breeding grounds in Heilongjiang (Brelsford & Du 2017).
Although not as readily distinguishable as the songs, the “tink” calls of Pale-Sak differ markedly and consistently and are a reliable basis for an ID (Yap et al. 2014; Round et al. 2016; Weprincew et al. 1989). Yap et al. say the call of Pale-legged is of a “consistently higher frequency” than the call of Sakhalin. The calls that I have recorded of the two species show a difference in frequency of about 1 kHz, very much in line with others’ findings (Brelsford, August 2017; Brelsford, September 2017).
For birders unaccustomed to Pale-Sak calls, the difference may be hard to detect, especially at windy Cape Nanhui. A sound-recorder (which may be a smartphone) will pick up the difference, and an audio spectrogram will show it graphically. Solid, indisputable ticks, in some cases life ticks, await enterprising birders who sound-record.
In recent months, my work with sound-recordings has helped give Shanghai birders a clearer picture not only of Sakhalin Leaf Warbler but also of Kamchatka Leaf Warbler Phylloscopus examinandus, like Sakhalin a poorly known passage migrant through Shanghai (Brelsford, June 2017). In the case of Pale-Sak in Shanghai, a picture is emerging of overlapping migratory pathways. This finding comports with the findings of Yap et al. at Beidaihe, a thousand kilometers to the north. After analyzing calls obtained at Beidaihe of both Pale-legged and Sakhalin, Yap hypothesizes that in coastal Hebei “the migratory pathways of the two sister species may largely overlap” (2014).
How extensive is the Pale-Sak migratory overlap in Shanghai? How many of the Pale-Saks that we find in Shanghai each spring and autumn are Pale-legged, and how many are Sakhalin? Is there a peak passage time in Shanghai for each species, and if so, when is it?
Answers to these questions are currently unknown, but they are probably knowable, and it is very much possible for the citizen-scientists of Shanghai to be the producers of that knowledge. We only need to change our habits. When it comes to identifying lookalike species such as Pale-legged and Sakhalin Leaf Warbler, birders need to understand that photos do nothing to cut through the muddle. Only sound-recordings lead to indisputable records and a clearer picture of the species in Shanghai.
A clearer picture will add to our knowledge of the movement of leaf warblers along the central Chinese coast, focus attention on little-known East Asian species, and heighten the allure of Shanghai as a world-class birding location.
The sound-recordings and audio spectrograms below show clearly the difference in frequency between the calls of Sakhalin and Pale-legged Leaf Warbler.
Round, Philip D. E-mail message to Craig Brelsford, 18 Oct. 2016. Round’s e-mail message was originally cited in the shanghaibirding.com post “Pale-legged Leaf Warbler & the Shanghai Big 5,” published 26 Sept. 2016 (accessed: 12 April 2019).
Round, Philip D., Pierce, Andrew J., Saitoh, Takema, & Shigeta, Yoshimitsu. 2016. Addition of Kamchatka Leaf Warbler Phylloscopus examinandus and Sakhalin Leaf Warbler P. borealoides to Thailand’s Avifauna. Bulletin of the Japan Bird Banding Association 28: 9–21. Available here for download (708 KB) through shanghaibirding.com. (Accessed: 12 April 2019.)
Weprincew, B. N., Leonowitsch, W. W. & Netschajew, W. A. 1989. Zur Lebensweise von Phylloscopus borealoides Portenko und Phylloscopus tenellipes Swinhoe. Mitteilungen aus dem Zoologischen Museum in Berlin 65 (Suppl.): 71–80. (German only)
Yap, F., Yong, D. L., Low, B., Cros, E., Foley, C., Lim, K. K. & Rheindt, F. E. 2014. First wintering record of the Sakhalin Leaf Warbler in South East Asia, with notes on vocalisations. BirdingASIA 21: 76–81.
Featured image: Sakhalin Leaf WarblerPhylloscopus borealoides, Cape Nanhui, Shanghai, 17 Sept. 2017. Craig Brelsford photographed and sound-recorded this individual, getting a rare record of the poorly known species in Earth’s Greatest City.
As summer melts into fall, Pudong’s Cape Nanhui continues to prove to be one of the best birding locations in China. In the period 26 Aug. to 8 Sept. 2017, I birded four days at the most southeasterly point of Shanghai, as well as at other key locations in Earth’s Greatest City. I noted 106 species.
After nearly 10 years in Shanghai and countless visits to Cape Nanhui, I still occasionally score life birds there, a testament to the richness of the hot spot. Such was the case 4 Sept. with Brown-chested Jungle Flycatcher. The bird, an adult, was in Microforest 1 (30.923889, 121.971635).
Brown-chested Jungle Flycatcher is a very scarce vagrant to Shanghai. Cyornis brunneatus breeds in southeast China and spends the winter in peninsular Malaysia, Sumatra, and Borneo. It is uncommon even in its core range and virtually unknown in the Shanghai region outside Cape Nanhui; the place closest to Shanghai where I have heard of it occurring is Emeifeng, 635 km southwest of Shanghai in Fujian.
The IUCN lists the species as Vulnerable because of the loss of mature primary lowland forest throughout its range.
Amur Paradise Flycatcher Terpsiphone incei
Japanese Paradise Flycatcher T. atrocaudata
3 Amur found 27 Aug. at Binhai Forest Park, the heavily wooded green space near Cape Nanhui, 4.5 km inland from the East China Sea. A stunning white-morph male and rufous-morph were continuously together, and we found a single rufous-morph in another part of the park. The white-morph as well as the rufous-morph accompanying it were calling. I have seen dozens of paradise flycatchers in Shanghai over the years and heard only one call (a Japanese for 1 or 2 seconds). Why were the Amur at Binhai Forest Park calling?
Binhai Forest Park is visited little and birded even less; could this quiet, thickly wooded park hold breeding Amur Paradise Flycatcher? As the white-morph male looks like something out of a fairy tale and is a bird even a non-birder would recognize, I asked park employees whether they had seen it. All said no.
The white-morph Amur that U.S. birder Tom Hurley and I saw was only the second I had ever beheld and a first for me in Shanghai. At Dongzhai National Nature Reserve, Henan, on 5 June 2010, I photographed the white-morph shown right. The Binhai white-morph lacked the long tail feathers of the bird I saw at Dongzhai but was still an unforgettable sight.
Japanese Paradise Flycatcher is the more common of the two paradise flycatchers in Shanghai. The photo above shows the differences in upperpart coloration between rufous-morph Amur Paradise Flycatcher and Japanese Paradise Flycatcher.
Fairy PittaPitta nympha
On 4 Sept. at Nanhui, my wife, Elaine Du, and I sneaked away from the action in Nanhui’s Microforest 1, where the photographers were set up. Microforest 4 was devoid of humans and peaceful. I tiptoed in. I scanned the undergrowth before me and, to my surprise, found a Fairy Pitta.
The pitta was standing on the ground, almost completely blanketed by a tangle of leaves, branches, and vines. Its big black eye was fixed on me. It didn’t move. I looked at the pitta, the pitta at me.
We stared at each other for 10 minutes.
Thus roosts the pitta during migration. It parks itself in thickets and waits. It bides its time, conserves its energy. Somewhere south of Shanghai, it will veer off the coast and fly non-stop across the South China Sea to Borneo, where it will spend the winter.
The pittas are mainly tropical species. Most are short-distance migrants. Not Fairy Pitta. No pitta invades the temperate world as deeply as Fairy Pitta; none makes so audacious an incursion into the north. None makes so long and daring a migration across hundreds of miles of sea.
My pitta was saving up its energy for its life-or-death run across the sea. Good luck, you explorer, you risk-taker! Good luck, Fairy Pitta.
Greater Painted-snipe Rostratula benghalensis
Viewed with Elaine at dusk 3 Sept. then viewed again the next morning at dawn. For weeks, the painted-snipes have been found at a single spot (30.939534, 121.955370) in a trash-strewn canal. Earlier, when news of the painted-snipe at Cape Nanhui first broke, I wrote a post in which I regretted sharing the location where were found the painted-snipes, a rare species in Shanghai. As things stand now, I can breathe easier; the many photographers who have visited the location have had no ill effect. The birds I found 4 Sept. were aware of me but behaved normally. They fed, drank, and preened. I used my car as a blind and never got out. The painted-snipes at Nanhui tolerate photographers confined to their cars.
Asian Dowitcher Limnodromus semipalmatus
27 Aug., South Pond. Juvenile. Videoed by me using my iPhone 6, adapter by the U.S. company PhoneSkope, and my Swarovski ATX-95 spotting scope:
Chinese EgretEgretta eulophotes
Below, video of Chinese Egret 26 Aug. at Cape Nanhui showing differences between Chinese Egret and Little Egret.
Yellow BitternIxobrychus sinensis
Photographed by me in gorgeous morning light 4 Sept. at Cape Nanhui.
Black BitternIxobrychus flavicollis
Uncommon in Shanghai. Found 26 Aug. at Cape Nanhui.
Striated HeronButorides striata
Uncommon in Shanghai. Found 27 Aug. at Binhai Forest Park.
In high-tide roost 4 Sept. on South Beach (30.860673, 121.925113), just north of Donghai Bridge at Cape Nanhui.
Curlew SandpiperC. ferruginea
South Pond, Cape Nanhui, 26 Aug. Video:
Pin-tailed SnipeGallinago stenura
Party of 3 on 26 Aug. at Cape Nanhui. When flushed, made loud, raspy, memorable call. I quickly compared the call I had just heard to calls of Pin-tailed Snipe downloaded from xeno-canto.org to my iPhone. The match was perfect. Lookalike Swinhoe’s Snipe rarely calls when flushed. Dark underwing clear in my many photographs of the trio. Flew high when flushed, then returned to land at point only 50 m from where originally flushed.
Gull-billed TernGelochelidon nilotica
The canals on the inland side of the sea wall were resounding with the characteristic yaps of this passage migrant. A clear photo is especially useful for discerning the thick bill.
Riparia riparia is an uncommon passage migrant in Shanghai. Note the well-defined breast band on my bird, distinguishing it from Pale Martin Riparia diluta, which has an ill-defined breast band.
Siberian Blue RobinLarvivora cyane
It’s worth stressing how good is our opportunity here in Shanghai to view Siberian Blue Robin for a few short weeks each spring and fall. On the breeding grounds up in northern China, the males sing loudly and beautifully but are very hard to see; no Siberian Blue Robin I experienced on the breeding grounds ever sang from anything like an exposed perch. The few I was able to see in Elaine’s hometown of Boli, Heilongjiang sang on or near the ground. Females are almost impossible to see; in fact, I saw not one in Heilongjiang in May-June 2016. Siberian Blue Robin are also apparently hard to see on their wintering grounds in south China and Southeast Asia. Places such as Cape Nanhui are probably among the best places in the world to view this common but shy species. We Shanghai birders have yet another reason to count ourselves lucky.
Also noted by me in Shanghai 27 Aug.-8 Sept. 2017:
Garganey Spatula querquedula Common Pheasant Phasianus colchicus Little Grebe Tachybaptus ruficollis Grey HeronArdea cinerea Purple HeronA. purpurea Great EgretA. alba Intermediate EgretA. intermedia Little EgretEgretta garzetta Eastern Cattle EgretBubulcus coromandus Black-crowned Night HeronNycticorax nycticorax Chinese Pond HeronArdeola bacchus Common MoorhenGallinula chloropus Eurasian CootFulica atra Black-winged StiltHimantopus himantopus Pied AvocetRecurvirostra avosetta Kentish PloverCharadrius alexandrinus Lesser Sand PloverC. mongolus Greater Sand PloverC. leschenaultii Little Ringed PloverC. dubius WhimbrelNumenius phaeopus Far Eastern CurlewN. madagascariensis Eurasian CurlewN. arquata Black-tailed GodwitLimosa limosa Ruddy TurnstoneArenaria interpres Red KnotCalidris canutus Broad-billed SandpiperC. falcinellus Sharp-tailed SandpiperC. acuminata Long-toed StintC. subminuta Red-necked StintC. ruficollis SanderlingC. alba DunlinC. alpina Common SnipeGallinago gallinago Red-necked PhalaropePhalaropus lobatus Common SandpiperActitis hypoleucos Grey-tailed TattlerTringa brevipes Spotted RedshankT. erythropus Common GreenshankT. nebularia Marsh SandpiperT. stagnatilis Wood SandpiperT. glareola Common RedshankT. totanus Oriental PratincoleGlareola maldivarum Black-tailed GullLarus crassirostris White-winged TernChlidonias leucopterus Whiskered TernC. hybrida Common TernSterna hirundo Feral Pigeon (Rock Dove) Columba livia Red Turtle DoveStreptopelia tranquebarica Spotted DoveS. chinensis Himalayan SwiftletAerodramus brevirostris Lesser CoucalCentropus bengalensis Oriental DollarbirdEurystomus orientalis Eurasian WryneckJynx torquilla Common KingfisherAlcedo atthis Common KestrelFalco tinnunculus Black-winged CuckooshrikeCoracina melaschistos Tiger ShrikeLanius tigrinus Brown ShrikeL. cristatus Long-tailed ShrikeL. schach Black-naped OrioleOriolus chinensis Japanese TitParus minor Black-throated BushtitAegithalos concinnus Japanese White-eyeZosterops japonicus Barn SwallowHirundo rustica Light-vented BulbulPycnonotus sinensis Arctic/Kamchatka Leaf/Japanese Leaf WarblerPhylloscopus borealis/examinandus/xanthodryas Eastern Crowned WarblerP. coronatus Oriental Reed WarblerAcrocephalus orientalis Thick-billed WarblerIduna aedon Zitting CisticolaCisticola juncidis Plain PriniaPrinia inornata Reed ParrotbillParadoxornis heudei Vinous-throated ParrotbillSinosuthora webbiana Javan MynaAcridotheres javanicus Crested MynaA. cristatellus Chinese BlackbirdTurdus mandarinus Grey-streaked FlycatcherMuscicapa griseisticta Asian Brown FlycatcherM. dauurica Oriental Magpie-RobinCopsychus saularis Blue-and-white FlycatcherCyanoptila cyanomelana Yellow-rumped FlycatcherFicedula zanthopygia Chinese GrosbeakEophona migratoria Eurasian Tree SparrowPasser montanus Eastern Yellow WagtailMotacilla tschutschensis tschutschensis White WagtailM. alba
Featured image: All-star birds of late summer 2017 at Pudong’s Cape Nanhui: Clockwise from top left, Brown-chested Jungle Flycatcher, Fairy Pitta, Greater Painted-snipe, and Great Knot. The Brown-chested Jungle Flycatcher and Greater Painted-snipe were photographed 4 Sept. 2017 at Cape Nanhui. Fairy Pitta photographed 5 June 2010 in Dongzhai, Henan, and Great Knot photographed 11 Sept. 2014 at Yangkou, Rudong, Jiangsu. (Craig Brelsford)
In the wake of my recent post on distinguishing Pale-legged Leaf Warbler from Sakhalin Leaf Warbler by call, I have been hoping to find more members of this species pair in Shanghai. On 4 Sept. 2017 at Pudong’s Cape Nanhui, my hopes were fulfilled in a big way. At the Magic Parking Lot (30.884889, 121.968222), not one but both species were calling.
Below, the recordings I made with my Olympus DM-650 pocket recorder. The first Sakhalin recording was made at Microforest 4 (30.953225, 121.959083), 7.7 km north of the Magic Parking Lot on the coastal road. The others were made at the Magic Parking Lot.
Note the higher frequency of the calls of Pale-legged—on average a full kilohertz higher. The difference is discernible by the keen listener, but nothing tells the story better than the spectrograms.
To summarize what I argued in the previous post: The calls, as well as the very distinctive songs, of Pale-legged Leaf Warbler and Sakhalin Leaf Warbler are diagnostic—that is, they differ markedly and consistently and are a reliable basis for an ID. The diagnosability of the calls of the two species has been affirmed by various researchers, among them Yap et al. (2014; Birding Asia 21: 76–81).
Featured image: Pale-legged/Sakhalin Leaf Warbler, Yangkou, Rudong, Jiangsu, 1 May 2014. Photo by Craig Brelsford. Some of the salient characteristics of Pale-Sak are pointed out. Separating Pale-legged from Sakhalin on the basis of plumage and bare parts is not possible; because this bird was neither singing nor calling, it cannot be determined to which of the two species it belongs.