578. Turdus atrogularis

(578) Turdus atrogularis Temm.
THE BLACK-THROATED THRUSH.
Turdus atrogularis, Fauna B. I., Birds, 2nd ed. vol. ii, p. 137.
This Thrush’s real breeding area is in Western Siberia and Western Central Asia, extending, perhaps, to Chitral and Gilgit. Occasion¬ally it breeds in the Himalayas within our limits but such cases must be considered quite abnormal.
In 1904—5 Rattray took two nests with eggs and Buchanan obtained one. In reply to a letter from me, Rattray wrote :— “Your letter about Merula atrigularis. I found one nest last year with three eggs and one this with two eggs whole and one broken ; these latter I sent you. The birds are around Dangagali in large numbers in May but then clear out, a few breeding about 9,000, 10,000 feet. Both nests were the usual twig-and-moss nest with lining of fine grasses, but with no mud in it, built on large branches of fir-trees near the main trunk at about 20 to 30 feet up. The 1904 nest was on a hill in dense forest about 9,000 feet and this year’s on Miranjani about 10,000 feet.”
Buchanan’s nest, also containing three eggs, was found on the same peak—Miranjani.
Before this, however, I had bought a small collection of eggs collected by Captain Taylor in Sikkim. Amongst these were two clutches of eggs marked “Merula maxima” ; later I obtained his collection of skins also, and then found two female Blackbirds, shot off their nests, which, though marked maxima, were really atrogularis.
So far as I know, the above are the only Indian-taken nests. Neither Rattray himself nor any one of the numerous collectors round Murree have ever again come on it breeding there, nor have Stevens, Osmaston, Inglis or any of the older collectors, such as Gammie, Mandelli etc., ever seen it in Sikkim during the breeding season.
Popham took numerous nests of this Thrush on the Yenesei and describes the nest as a deep, heavy cup made of moss, grasses and twigs, sometimes with, and sometimes without, an inner layer of mud and with a final lining of fine grasses.
Although only three eggs have been found in each of the Indian- taken nests, four, five or even six are found in Siberian clutches. All the Indian eggs were exactly like the most common type of English Blackbird’s egg, whilst Siberian-taken eggs vary from this type to one with a brighter bluer ground more boldly blotched and freckled with light reddish. I have seen no eggs approaching the Thrush type.
In shape the eggs are normally rather long ovals, often decidedly pointed. The texture is fairly close and fine and, in a few instances, there is a distinct gloss, which disappears when the eggs have been long taken.
Forty-seven eggs average 29.6 x 21.4 mm. : maxima 33.0 x 21.1 and 31.4 x 22.1 mm. ; minima 27.4 x 21.6 and 31.2 x 20.0 mm.

BookTitle: 
The Nidification Of Birds Of The Indian Empire
Reference: 
Baker, Edward Charles Stuart. The nidification of birds of the Indian Empire. Vol. 2. 1933.
Title in Book: 
578. Turdus atrogularis
Spp Author: 
Temm.
Book Author: 
Edward Charles Stuart Baker
CatNo: 
578
Year: 
1933
Page No: 
121
Common name: 
Black Throated Thrush
M_ID: 
27396
M_CN: 
Black-throated Thrush
M_SN: 
Turdus atrogularis
Volume: 
Vol. 2
Term name: 
id: 
13749

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