618. Cochoa viridis

(618) Cochoa viridis Hodgs.
Cochoa viridis, Fauna B. I., Birds, 2nd ed. vol. ii, p. 185.
The range of the Green Thrush is very much the same as that of the Purple bird, being found from Kuman and Garhwal to East and South Assam, the whole of the Burmese hill-tracts to Tenasserim and through the Indo-Chinese countries to Western China.
The only nest and eggs known to Hume * were sent to him from Sikkim, where they were taken in June at 10,000 feet, and from whence they have also been recorded at 11,000 feet. In spite of this, they are probably normally birds of much lower elevations. In the British Museum there are several Summer specimens from the Rammam Valley, in Sikkim, 2,500 to 3,000 feet, and they occur throughout the Assam Hills between 2,500 and 5,000 feet during the breeding season. They are rare birds and, from their shyness, quietness and their habit of frequenting dense cover, possibly appear to be even more rare than they really are.
I have only seen the birds and their nests in very dense evergreen forest with abundant undergrowth, nearly always, also, where the ground is precipitous, rocky and difficult to move in. Whymper, who took a nest near Naini Tal at 4,000 feet, found it in similar forest, and Hopwood also took it in “wet tropical forest” at Thandaung, Lower Burma, 4,000 feet. The nest may be placed in any small tree between 6 and 25 feet, but one near water is nearly always chosen for the purpose. No attempt at concealment is made, though in such thick forest the nest cannot be seen from very far.
The nest itself is exactly like that of the Purple Thrush. One taken by myself measured 6.1/2 inches in diameter by less than 2 inches deep, the cavity being about 3.1/2 x 1.1/2 inches. The lining almost invariably contains white thread-like lichen, a material seldom used by birds other than the Purple and Green Thrushes.
The breeding season in Assam is from the beginning of May to the end of June, and Whymper once found it breeding in July.
The number of eggs in a clutch is two or three, very rarely four, and in appearance they cannot be distinguished from those of the preceding bird, though they average smaller, possibly due to two almost abnormally small clutches in my series.
Forty-two eggs average 30.4 x 21.3 mm. : maxima 31.1 x 21.2 and 29.3 x 23.2 mm. ; minima 26.8 x 19.8 mm.
* In ‘Nests and Eggs,’ 2nd ed. vol. ii, p. 111, reference is made to other nests found in Sikkim at 9,000 to 10,000 feet, but there is only one egg of this bird in the Hume collection. I cannot trace the source of this note.

The Nidification Of Birds Of The Indian Empire
Baker, Edward Charles Stuart. The nidification of birds of the Indian Empire. Vol. 2. 1933.
Title in Book: 
618. Cochoa viridis
Spp Author: 
Book Author: 
Edward Charles Stuart Baker
Page No: 
Common name: 
Green Thrush
Green Cochoa
Cochoa viridis
Vol. 2
Term name: 

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