889. Seicercus burkii burkii

(889) Seicercus burkii burkii (Burton).
THE SIKKIM BLACK-BROWED FLYCATCHER-WARBLER.
Seicercus burkii burkii, Fauna B. I., Birds, 2nd ed. vol. ii, p. 487.
Although common nowhere, this species has a wide range, being found from the North-West Frontier to Assam, both East and South of the Brahmapootra. Manipur and the Chin Hills are the meeting ground, or intermediate ground, between this and the next race, tephrocephalus ; but, whereas in Manipur most birds are nearer the present race, those from the Chin Hills are all placed with tephro¬cephalus by Harington, Mackenzie, Venning and other collectors and ornithologists.
Birds from the North-West Frontier to Nepal are now separated by Ticehurst under the name Seicercus burkii whistleri.
Its haunts differ in no way from those of the last species but it is sometimes found at far higher levels, Whymper obtaining its nest at 11,000 feet in Garhwal. In Sikkim Osmaston found it breeding at 6,500 feet but Stevens thinks it breeds up to fully 9,000.
In Assam it breeds from 3,500 feet in North Cachar up to 8,000 in the Naga Hills.
The sites of the nests are very much the same as those selected by the preceding bird and, as a rule, the nest is placed on low sloping banks more or less covered with long green moss, or on the banks of ravines running through forest. Occasionally the nests are placed on batiks covered with weeds and grass, or with fern and bracken and, where this is the case, they are varied in construction to suit the surroundings.
In Margherita, or rather in the Patkoi Naga Ranges just above that place, Coltart took several nests, and these were either of moss or grass outside, according to whether the surroundings were one or the other. Even when the nests were all moss, the inner part was quite differently put together for, while the outer part was moss just interwoven, the inner portion was almost felted, so much work was put into it. This species seems never to use down in the lining.
The nests are generally little balls between 4 and 5 inches either way, but one of the first taken by me was a long upright oval, about 8 inches in height and 4.1/2 inches in width.
The breeding season is a long one and in Assam I have taken eggs from the 8th of April to the end of June, while Osmaston took a nest near Darjiling on the 6th July.
The eggs are quite typical of the genus—pure white and glossy, broad ovals, and stout-shelled for their size.
Forty eggs average 16.1 x 12.3 mm. : maxima 16.7 x 13.1 mm. ; minima 15.0 x 12.7 and 15.9 x 11.8 mm.
Both sexes share in the duties of incubation.

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: 
889. Seicercus burkii burkii
Spp Author: 
Burton
Book Author: 
Edward Charles Stuart Baker
CatNo: 
889
Year: 
1933
Page No: 
438
Common name: 
Black Browed Flycatcher Warbler
M_ID: 
23121
M_CN: 
Green-crowned Warbler
M_SN: 
Seicercus burkii
Volume: 
Vol. 2
Term name: 
id: 
14000

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith