1635. Batrachostomus moniliger

(1635) Batrachostomus moniliger Layard.
THE CEYLON FROGMOUTH.
Batrachostomus moniliger, Fauna B. I., Birds, 2nd ed, vol. iv, p, 381.
This Frogmouth occurs from the Wynaad South through Travan¬core to the whole of Ceylon.
The breeding habits of the Ceylon Frogmouth are much the same as those of the Sikkim bird except that it is not found so exclusively in evergreen forest. The nest was first found by Bourdillon in Travancore and, since that was recorded, a magnificent series of nests and eggs has been collected by J. Stewart.
According to his notes, supplied to me from time to time with eggs, the Frogmouths seem generally to breed in deep forests which are dark and shady but occasionally in deciduous and more open forest. They were most common at about 2,000 feet, but were found up to 4,000 and, again, nearly down to the level of the plains. The nests were just like those of the Sikkim Frogmouth, small pads of down from the lower surface of the bird’s plumage welded into very tough, felt-like pads fixed to the upper surface of a horizontal bough of a tree at any height between 6 and 15 feet. Internally the only material used is the birds’ down, but externally the nests are covered with scraps of green moss, lichen or bark, rendering them almost indistinguishable from the branch on which they are placed. The pads vary in size from 1.3/4 to 2.3/4 inches across by about 3/4 to 1.1/4 in depth, the internal egg-cavity being merely large enough to receive one egg, roughly about 1.1/4 inch in diameter by 1/2 an inch or less in depth.
The normal breeding season is January to April, hut odd eggs have been taken by Stewart in the months June to September. In Kanara Bell took eggs in March, Only one egg is laid, quite typical of the family, but much larger in proportion to the size of the bird than either of the two preceding races.
Thirty eggs average 29.9 x 20.6 mm, : maxima 81.1 x 22.0 mm. ; minima 27.6 x 19.0 mm.
The birds sit very close, but will not allow themselves to be caught by hand, though they have no objection to being photographed at very close quarters. The cock bird in this species, as in hodgsoni, seems to do most of the incubation by day.

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: 
1635. Batrachostomus moniliger
Spp Author: 
Layard.
Book Author: 
Edward Charles Stuart Baker
CatNo: 
1635
Year: 
1934
Page No: 
494
Common name: 
Ceylon Frogmouth
M_ID: 
7053
M_CN: 
Sri Lanka Frogmouth
M_SN: 
Batrachostomus moniliger
Volume: 
Vol. 3
id: 
14799

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