1150. Krimnochelidon concolor concolor

(1150) Krimnochelidon concolor concolor* Sykes.
Ptyonoprogne concolor. Fauna B, I., Birds, 2nd ed. vol. iii. p. 237.
Krimnochelidon concolor, ibid. vol. viii, p. 658.
With the exception of Sind, the Dusky Crag-Martin breeds from the Nilgiris in the South to the Himalayas in the North, while East it extends to Bihar and the drier districts of Western Bengal.
This Crag-Martin does not breed in colonies, but sometimes two, three or even four nests may he found quite close together on the same rock or building. Usually, however, the nests are quite solitary.
The sites selected vary greatly. Often they are built on houses and other buildings under the protection of the eaves or some other portion which hangs well over the nest. At other times they are placed under bridges, on the walls of wells (B. Aitken), the walls of forts and mosques etc. Perhaps, however, they most often make their nests under some rock, or ledge on the faces of cliffs and precipices or lofty banks of rivers. Wherever, however, it may be situated it seems invariably to be protected above by some portion of the building or rock which projects above it.
* Mr. T. R Livesey having recently discovered a new form of concolor in the Shan States, our bird has to have a trinomial.
Miss Cockburn found in the Nilgiris “one nest constructed in a small cave which had been dug out of the earth, where some pretty moss and ferns were growing.” Williams found a small colony breeding on the rocks near the Laws Falls on the Coonoor road, where, in addition to being overhung by rocks, the nests were “partially concealed by small tufts of maiden-hair fem.”
The nest is a typical Swallow’s nest, an open half-saucer made of pellets of mud and lined with feathers and odd scraps. Blewitt says that the nests he found were lined with feathers and the flowering ends of grasses, while Betham found one nest lined with grass and just a few feathers.
The birds have two fairly well defined breeding seasons almost everywhere, the first in February and March, the second after the Rains have broken in July and August. At the same time nests and eggs may be found in practically every month of the year.
In January they have been taken by Sparrow in the Deccan and by Betham at Baroda. In February Butler obtained eggs in Belgaum and Davidson and Wenden in Sholapoor. In March eggs have been taken in many places : in Poona (Aitken) ; Shola¬poor (Davidson and Wenden) ; Rajputana (Barnes) ; Central Provinces (Thompson and Williams) ; Belgaum (Butler). In April they have been found in the Nilgiris (Cockburn, Cardew, Wilson etc.) ; Rajputana (Barnes) ; Central Provinces (Thompson) ; Trimulgherry (Sparrow). May has produced eggs on the Nilgiris (Cockburn) and in Wellington (Williams) and in Poona (Aitken). During June, July and August nests with eggs have been taken in the Nilgiris (Blewitt) ; Aboo, Deesa and Belgaum (Butler) ; Sholapoor (Davidson and Wenden) ; Rajputana (Barnes) ; Saugur (Thompson) ; Poona (Betham) ; and Trimulgherry (Sparrow). Butler also took eggs in Deesa in September and October, and in the latter month Bingham found fresh eggs in Allahabad.
We thus have only the two months November and December in which eggs have not been recorded.
The number of eggs in a clutch is two to four, though once Betham took five eggs in Guzerat.
In appearance they are quite typical Swallow’s eggs, but are broad and not long ovals as a rule. Texture and surface are quite normal.
One hundred eggs average 17.0 x 12.8 mm. : maxima 19.2 x 14.0 mm. ; minima 16.1 x 12.9 and 16.5 x 12.0 mm.
Both parents assist in constructing the nest and both apparently take part in incubation.

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: 
1150. Krimnochelidon concolor concolor
Spp Author: 
Book Author: 
Edward Charles Stuart Baker
Page No: 
Common name: 
Indian Dusky Crag Martin
Ptyonoprogne concolor concolor
Vol. 3

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