8(a). Corvus macrorhynhus macrorhynchus

(8 a) Corvus macrorhynchus macrorhynchus Wagler.
THE MALAYAN JUNGLE-CROW.
(Fauna B. I., Birds, 2nd ed. Not included.)
The Malayan Jungle-Crow, or Southern Jungle-Crow, as Robinson calls it, breeds within our limits only in the South of Tenasserim, whilst even here the form is somewhat intermediate between true macrorhynchus and the more Northern form andamanensis. There is nothing on record about its breeding in Tenasserim, though both J. M. D. Mackenzie and Cyril Hopwood met with it. In that Province, as in the Malay States, it is found plentifully in open country, so long as it is well wooded, all round villages and towns, and is not a bird of dense forests like its Northern cousin. Mr. E. G. Herbert collected a very fine series of eggs of this Crow in Siam which he very kindly gave me with the rest of his collection. The breeding habits he describes in the Journal of the Siam Natural History Society (vol. vi, p. 83, 1923) as follows:—
“The commonest Crow in Bangkok. They nest more or less in straggling colonies, either on the outskirts of a town or in and around the villages, and I have only found their nests in the neigh¬bourhood of human habitations. The nesting season is January and February, though I have had a clutch of five fresh eggs as early as December the 23rd and, occasionally, clutches of fresh eggs may be taken in the beginning of March, but these are probably due to the birds being disturbed in their earlier nesting efforts.
“The nest is a large structure of sticks and twigs, too well known to require much description, but the materials should be noted. It is lined chiefly with fibre, though roots, scraps of rubbish and hair of various kinds are also included, but warm material of the nature of vegetable down is not. The favourite site is a forked branch near the top of a Mango or Tamarind tree, though Pepul trees and sometimes Coconut palms are used.”
In 1916-18 Sir W. F. M. Williamson collected a further series of their eggs neer Bangkok, all in January and February, and his description of their nidification endorses that of Mr. Herbert. The full clutch of eggs numbers from four to six, showing that this bird is an interesting exception to the general rule that Southern forms lay smaller clutches of eggs than their Northern relations. The eggs at once strike one on account of their very deep colour, some eggs being almost a blackish-green and others having a distinct brownish tinge. Most eggs have the ground-colour slightly darker than it is in those of other races, but the darkness is due principally to the depth of colour and denseness of the distribution of the blotches. In some eggs the ground-colour is completely covered and in but few does it show up at all boldly.
One hundred eggs average 43.9 x 30.2 mm. : maxima 48.0 x 30.3 and 45.6 x 33.0 mm. ; minima 41.0 x 29.9 and 43.2 x 28.1 mm.
It is probable that in this species both parents took a part in incubation. Certainly they do so far as the Burmese bird is con¬cerned, for I have frequently watched them, change over in the early mornings and late evenings in nests built in Mango trees just in front of my window. During the heat of the day both birds leave the eggs uncovered, as, indeed, is the custom with the great majority of Passerine birds in India except in the hottest and the coldest parts. In the former they require shade to prevent their being cooked and spoilt and in the latter regions it is too cold as¬ a rule to risk leaving them and their getting chilled.

BookTitle: 
The Nidification Of Birds Of The Indian Empire
Reference: 
Baker, Edward Charles Stuart. The nidification of birds of the Indian Empire. Vol. 1. 1932.
Title in Book: 
8(a). Corvus macrorhynhus macrorhynchus
Spp Author: 
Wagler.
Book Author: 
Edward Charles Stuart Baker
CatNo: 
8
Year: 
1932
Page No: 
12
Common name: 
Malayan Jungle-ceow
M_ID: 
20581
M_SN: 
Corvus macrorhynchos macrorhynchos
Volume: 
Vol. 1
id: 
13232

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