1626. Caprlmulgus indicus jotaka

(1026) Caprimulgus indicus jotaka Temm. & Schl.
Caprimulgus indicus jotaka, Fauna B. I., Birds, 2nd ed. vol. iv, p. 367.
I still retain this Nightjar as a race of indicus because I can find no character by which I can separate it. At the same time its eggs are so utterly unlike the eggs of any other race of indicus that I cannot help feeling it is wrongly included in that species.
Within Indian limits it breeds in the Sub-Himalayas from Kuman to Assam, while its extra-limital breeding range extends to North China, the Amur and Japan,
This Nightjar was extraordinarily common in the North Cachar Hills, breeding principally between 1,500 and 2,500 feet, rarely a little higher, and often in the foot-hills and even the adjacent plains. I have found the eggs deposited in almost every kind of forest other than deep evergreen, though they may he often taken from open glades or from patches of cultivation surrounded by such forest. The favourite breeding sites are ravines either in scrub, secondary growth or in thin forest ; here they select open patches of stone or rock, accumulations of leaves or bamboo spathes, depositing their eggs on these, sometimes quite exposed, sometimes protected by a stone, stump or bush. One pair of these birds laid their eggs every year under a dense Bouganvillea hedge in my garden and, though every year the eggs were taken by vermin, generally Civet cats of sorts, they still stuck to the site, and at last, after I had poisoned two civet cats, actually hatched and reared two young. The eggs were very conspicuous on the brown ground, but the young were invisible, and if one succeeded in finding them they lay absolutely still and flattened out, and were very hard to find again if once the eyes were taken off them.
I have taken egga from the 23rd March to the end of August, and probably most pairs have two broods. More eggs, however, will be found in April and May than in any other months.
The eggs are quite unlike those of the other races of indicus and are just tike those of the European Nightjar. Nine out of ten have a white ground and are marbled with primary markings of rather dark grey or greyish-brown, with secondary markings of pale grey. In a few eggs some of the primary markings are nearly black and in a few others these are only secondary markings of very pale grey. In some eggs, on the other hand, there are a few very large dark brown smears and blotches, as much as half an inch in length or breadth. Very rarely indeed the ground has a creamy tinge and, in such eggs, the markings are sometimes more reddish- brown.
One hundred Indian eggs average 30.7 x 52.7 mm. : maxima 33.1 x 23.1 and 31.5 x 28.5 mm. ; minima 27.2 x 20.3 mm.
The female alone seems to incubate by day, but the male takes her place in the early mornings and evenings. Incubation takes sixteen to seventeen days.

The Nidification Of Birds Of The Indian Empire
Baker, Edward Charles Stuart. The nidification of birds of the Indian Empire. Vol. 3. 1934.
Title in Book: 
1626. Caprlmulgus indicus jotaka
Spp Author: 
Book Author: 
Edward Charles Stuart Baker
Page No: 
Common name: 
Japanese Jungle Nightjar
Grey Nightjar
Caprimulgus jotaka
Vol. 3
Term name: 

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