(761) Graucalus macei siamensis.
The Siamese Large Cuckoo-Shrike.
Graucalus macei siamensis Stuart Baker, Bull. B. O. C, xxxvii, p. 69 (1918) (Minam-Kraben, Siam).
Vernacular names. None recorded.
Description. Male similar to that of G. m. nipalensis, but the adult female differs from all the preceding races in having no bars on the chin, throat and upper breast. The Hainan form differs in being smaller and in having a darker chin and throat (larvatus Hartert).
Measurements. The following are the wing-measurements for the various areas inhabited by this subspecies:—
North Burma Wing 169 to 179 mm. 19 specimens,
Central Burma " 157 to 174 " 14 "
" 151 to 174 " 15 “
South Burma ..... " 168 to 180 " 9 “
“ 163 to 174 " 5 "
Siam " 156 to 192 " 8 “
“ 156 to 160 " 7 "
Numerous unsexed birds come in all cases in between the extremes given for the two sexes and substantiate the above.
Distribution. Eastern and South Assam, Burma, Chin, Kachin Hills, Shan States, Siam and Indo-Chinese countries.
Nidification. Similar to that of G. m. nipalensis. Hopwood found a nest with eggs, near Akyab, in March and in this month Anderson also took eggs in the Andamans. In Assam it breeds in May and June, rarely in April. The eggs, which are generally two only, seldom three, average, for ten, 32.0 X 22.5 mm.
Habits. Those of the species. This is a common bird in the Assam Hills South of the Brahmaputra below 3,000 feet, though it is found up to at least 4,000 feet. Those I examined had fed on insects of all kinds, many large species of Coleoptera, larvae of the same, fruit of several kinds, berries and, once only, millet. This latter may have been swallowed with the Aphidae, which were then infesting the ripe grain. It extends into the plains throughout the area in which it is found.