1330. Corydon corydon corydon

(1330) Corydon corydon corydon (Temm, & Laug,).
THE SUMATRAN Dusky Broadbill.
Corydon sumatranus sumatranus, Fauna B. I., Birds, 2nd ed, vol. iii, p. 404.
Corydon corydon corydon, ibid, vol. viii, p. 668.
The present species only comes within our limits in Tenasserim, whence it occurs South to Sumatra and East to Siam, Annam and Cochin China.
The Dusky Broadbills are inhabitants of very dense evergreen forest from the plains up to some 4,000 feet or, perhaps, 1,000 feet higher. Occasionally, however, it may be met with in thinner forest or in secondary jungle, but it never haunts cultivation or the vicinity of villages. Like all Broadbills, it seems to especially affect the banks of streams and rivers running through high tree-forest.
In 1909 and 1913 Kellow took a very fine series of the nests and eggs of this bird, which he presented to me. One nest was taken “near Perak,” the others “on the hills adjoining Taiping and Simpang, all between 2,000 and 4,000 feet.” The nests sent to me were typical Broadbills’ nests—huge, pendent structures, pear-shaped like those of the genus Psarisomus but still bigger. Some are as little as 3 feet in length and less than 2 in breadth, but one huge thing taken by Hopwood was 7 feet from top to bottom, this including the long hanging tail and the drawn-out neck to the pear. The first nest ever taken, one by A. E. Butler on June 20th, 1898, was also “just short of 7 feet in total length.” The entrance is about one-third down the body of the nest and is overhung with a large porch, constructed of the same materials as the body of the nest. These include gross, twigs, roots, bamboo-leaves, dead leaves of all kinds ; weed-stems and creeper-stems, often with the leaves still on, with a medley of everything else one can obtain in dense jungle. These materials are really well, compactly and strongly put together, but the birds hang outside the true nest a miscellaneous assortment of caterpillar excretae, cocoons and spiders’ egg-bags, leaves etc., sticking out in all directions and also hanging below in a long, loose tail which may measure over 2 feet in length. The lining is of green leaves.
Of three nests, of which details were given, two were hanging from pendent branches of trees over a stream and a third, similarly, over a little pool of water. These were between 15 and 30 feet from the ground, but the one taken by Hopwood was 40 feet from it, A nest found by Robinson near Pahang and one taken by Hopwood at 4,000 feet on Nwalabo Mountain were very similar in construction, but that taken by the former was lined with strips of palm-leaf.
The breeding season is from December (Robinson, three hard-set eggs) to April, though Hopwood found one nest in June with two eggs.
The full clutch of eggs is three or four, two only being sometimes incubated.
The ground-colour varies from a creamy-pink to a strong buff. Most eggs are rather densely covered all over with reddish freckles and small irregular blotches of the same colour, the general impression being obtained of a dull brick-red egg ; a few are marked less densely, except at the larger end, where they sometimes form caps or rings. As a rule one can hardly see the secondary blotches of pale reddish, but these, as well as others of lilac, are very noticeable in one egg of the pair taken by Hopwood,
In shape the eggs are broad, almost elliptical ovals, the texture coarse and the surface smooth but glossless.
Twenty eggs average 29.4 x 22.2 mm. : maxima 24.9 x 24.0 mm. ; minima 27.2 x 22.0 and 29.8 x 20.6 mm. The eggs taken by Robinson averaged 30.5 x 24.1 mm.

BookTitle: 
The Nidification Of Birds Of The Indian Empire
Reference: 
Baker, Edward Charles Stuart. The nidification of birds of the Indian Empire. Vol. 3. 1934.
Title in Book: 
1330. Corydon corydon corydon
Spp Author: 
Temm.&laug.
Book Author: 
Edward Charles Stuart Baker
CatNo: 
1330
Year: 
1934
Page No: 
262
Common name: 
Sumatran Dusky Broadbill
M_ID: 
12519
M_SN: 
Corydon sumatranus sumatranus
Volume: 
Vol. 3
Term name: 
id: 
14429

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