942. Prinia inornata burmanica

(942) Prinia inornata burmanica Harington.
THE COMMON BURMESE WREN-WARBLER.
Prinia inornata burmanica, Fauna B. I., Birds, 2nd ed. vol. ii, p. 536.
The Burmese form of the Common Wren-Warbler occurs in Assam, South of the Brahmapootra, though in some cases the birds in this province approach typical inornata. They extend thence through¬out the whole of Upper Burma and the Shan States, South about as far as Thayetmyo, while East it extends again into Northern Siam.
Except that it is rather more of a jungle bird than either of the two preceding races, there is little to differentiate it in its habits from them. It ascends the hills up to 4,000 feet where there is suitable open country for it, and it may often be seen in, and breeds in, secondary growth and in mixed bamboo- and scrub-jungle.
The nests are similar to those of the other races and, like them, are attached to bushes, grass or reeds at all heights from a few inches to about 4 feet from the ground.
In North Cachar and the Khasia Hills I have taken eggs in every month from March to October, but the very great majority of eggs are laid between the 15th May and 15th July. In Burma, apparently, the breeding time is not so extended and May to the middle of July seems to be the regular breeding season.
The full complement of eggs is three to five. In appearance they are like those of the Indian race but duller in tint, and many eggs show a distinct but dull pink tinge. Even in a series of the eggs of this one race there may be seen a gradual change from North to South. Among Livesey’s eggs taken in the Shan States and among Cook’s in the Bhamo Hills there are a few quite as bright as any from Ceylon, but there are none such from Northern India.
Among the abnormal specimens in my series there are one or two pure unspotted blue and there is one clutch of the curious Franklinia type.
Two hundred eggs average 15.5 x 11.4 mm. : maxima 17.2 x 11.7 and 16.5 x 12.3 mm. ; minima 14.0 x 11.1 and 14.7 x 10.6 mm.
* Prinia inornata herberti Stuart Baker, which is found over South-Central and South-Western Siam, may be found to be the form in the borders of Eastern Tenasserim. This most interesting race is very common in parts of Siam, and Herbert secured a wonderful series of its eggs, which he gave to me. They are extraordinarily interesting, as in them we obtain the other extreme of the long line of variation of the brilliant blue eggs laid by the Ceylon birds to the brilliant pink eggs laid by this subspecies. In the whole series given to me there are only two clutches which have a bluish ground, though these are nothing like the blue of the eggs of the Indian races. Some clutches have a white ground, but four out of five have a salmon ground. The markings are bold and very large, and vary from bright to deep purple-chestnut. The secondary blotches are pale reddish.

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: 
942. Prinia inornata burmanica
Spp Author: 
Harington.
Book Author: 
Edward Charles Stuart Baker
CatNo: 
942
Year: 
1933
Page No: 
490
Common name: 
Burmese Wren Warbler
M_ID: 
23835
M_CN: 
Plain Prinia
M_SN: 
Prinia inornata
Volume: 
Vol. 2
Term name: 
id: 
14048

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